How to store values in Write to database to the particular record?

Hello Everyone, I had a requirement that I had a requirement of transactions like (to transfer amount to one account to another account) I am able to do the transactions in Interface but How can I save that Values to the particular field in another record. Can anyone help me with this? Thanks in ADVANCE

a!localVariables(
  local!result,
  a!formLayout(
    label: "Transaction",
    contents: {
      a!columnsLayout(
        columns: {
          a!columnLayout(
            contents: {
              a!floatingPointField(
                label: "Available Balance",
                labelPosition: if(
                  ri!readOnly,
                  "ADJACENT",
                  "ABOVE"
                ),
                value: ri!COB_Applicant.kycid.transaction.availableBalance, 

                saveInto: ri!COB_Applicant.kycid.transaction.availableBalance,
                readOnly: ri!readOnly,
                disabled: false
              )
            }
          ),
          a!columnLayout(
            contents: {
              a!textField(
                label: "Account Number",
                labelPosition: "ABOVE",
                value: ri!COB_Applicant.accountnumber,
                saveInto: ri!COB_Applicant.accountnumber,
                disabled: true,
                validations: {}
              )
            }
          )
        }
      ),
      a!dropdownField(
        label: "Transaction",
        labelPosition: "ABOVE",
        placeholder: "--- Select a Value ---",
        choiceLabels: {"Send Money", "Add Money"},
        choiceValues: {"Send Money","Add Money"},
        value: ri!COB_Applicant.kycid.transaction.transaction,
        saveInto: ri!COB_Applicant.kycid.transaction.transaction,
        searchDisplay: "AUTO",
        validations: {}
      ),
      a!floatingPointField(
        label: "Add Money",
        labelPosition: "ABOVE",
        value: ri!COB_Applicant.kycid.transaction.credit,
        saveInto: ri!COB_Applicant.kycid.transaction.credit,
        refreshAfter: "UNFOCUS",
        showWhen: if(ri!COB_Applicant.kycid.transaction.transaction="Add Money", true, false),
        validations: {}
      ),
      a!buttonArrayLayout(
        buttons: {
          a!buttonWidget(
            label: "Add",
            value: 
            sum({ri!COB_Applicant.kycid.transaction.availableBalance, ri!COB_Applicant.kycid.transaction.credit}),
            saveInto:ri!COB_Applicant.kycid.transaction.availableBalance,
            submit: true,
            style: "NORMAL",
            showWhen: if(ri!COB_Applicant.kycid.transaction.transaction="Add Money", true, false)
          )
        },
        align: "END"
      ),
      a!floatingPointField(
        label: "Amount to send",
        labelPosition: "ABOVE",
        value: ri!COB_Applicant.kycid.transaction.debit,
        saveInto: ri!COB_Applicant.kycid.transaction.debit,
        refreshAfter: "UNFOCUS",
        showWhen: if(ri!COB_Applicant.kycid.transaction.transaction="Send Money", true, false),
        validations: {}
      ),
      a!dropdownField(
        label: "Dropdown",
        labelPosition: "ABOVE",
        placeholder: "--- Select a Value ---",
        choiceLabels: rule!COB_Applicant_ByAccountNumber2().accountnumber,
        choiceValues: rule!COB_Applicant_ByAccountNumber2().accountnumber,
        value: ri!target,
        saveInto:{
          ri!target,
          a!save(local!result,rule!COB_Applicant_ByAccountNumber(ri!target)) 
        } ,
        searchDisplay: "AUTO",
        validations: {}
      ),
      a!floatingPointField(
        label: "available balance",
        labelPosition: "ABOVE",
        value: ri!targetValue,
        saveInto: a!save(ri!targetValue, sum(result[1].kycid.transaction.availableBalance, ri!COB_Applicant.kycid.transaction.debit)),
        refreshAfter: "UNFOCUS",
        validations: {}
      )
      /*a!sideBySideLayout(*/
        /*items: {*/
          /*a!sideBySideItem(*/
            /*item: a!floatingPointField(*/
              /*label: "Available Balance",*/
              /*labelPosition: "ABOVE",*/
              /*value: */
              /*sum(local!result[1].kycid.transaction.availableBalance, ri!COB_Applicant.kycid.transaction.debit)*/
/**/
/**/
            /*,*/
              /*saveInto: */
              /*a!save(sum(local!result[1].kycid.transaction.availableBalance, ri!COB_Applicant.kycid.transaction.debit),local!result[1].kycid.transaction.availableBalance),*/
              /*refreshAfter: "UNFOCUS",*/
              /*validations: {}*/
            /*)*/
          /*)*/
        /*}*/
      /*)*/
    },
    buttons: a!buttonLayout(
      primaryButtons: {
        a!buttonWidget(
          label: "Submit",
          value: 
          {fixed(sum(ri!COB_Applicant.kycid.transaction.availableBalance)
          )-ri!COB_Applicant.kycid.transaction.debit,
                    
                    
                    
                    sum({local!result[1].kycid.transaction.availableBalance, ri!COB_Applicant.kycid.transaction.debit})

                   






          },
          saveInto: {ri!COB_Applicant.kycid.transaction.availableBalance,
          a!save(ri!targetValue, sum(result[1].kycid.transaction.availableBalance, ri!COB_Applicant.kycid.transaction.debit))
          },
          submit: true,
          style: "PRIMARY"
        )
      },
      secondaryButtons: {
        a!buttonWidget(
          label: "Cancel",
          value: true,
          saveInto: ri!cancel,
          submit: true,
          style: "NORMAL",
          validate: false
        )
      },
      showWhen: if(ri!COB_Applicant.kycid.transaction.transaction="Send Money", true, false)
    )
  )
)