Blue Prism Integration: provide a document file path to startProcess Integration

Hello Teams,
I'm integrating Appian with Blue Prism, both in cloud. Appian starts a process, creates and then passes variables to BP. Among these variables there are documents, uploaded via an Appian Interface to its folders, in cloud. I need to pass these documents to BP. Appian calls BP via Process Modeler, not via Interface. How to retrieve FilePath and URI of a cloud knowledge center folder/document? I've already set a "Move Document smart service" on my PM and the Destination sounds like [=tofolder(pv!Email.idFolder)]. Many thanks for suggestions.