How to setup customization file for a connected system?

The only documentation I've seen does not have any examples for this object type. I managed to create one shown below but I don't know if this is correct. Some input/guidance would be appreciated.

## connected system credentials for API
## Name: WM Maximo Passport Connection
content._a-0000e671-0a5b-8000-9c01-011c48011c48_9065909.authTypeOAuth Client Credentials Grant

  Discussion posts and replies are publicly visible