CRUD with Bubble App Connector - how to?

Hello Bubblers, apreciate any help with this:

I was able to create and read Things from app A
through app B. Now my next goal is to update and delete this same Thing. But when I try to “make changes to a Thing” backend workflow in app A, bubble makes me specify witch Thing it is that I want to change, but the input field that selects that Thing is in app B.

I’m using the Bubble App Connector, and tried to use the API Connector too, to pass the Thing I’m trying to change.

It is not a specific use case, I’m just learning to use this very nice plugin. Couldn’t find much documentation about how to use the Bubble App Connetor.

Any thoughts on this are welcome!

Thank you,