How to push Component ID from the EPMDoc occurrence table to the WTPart occurrences table

Initial info:  all of our epmdocuments are owner linked to their own wtparts

When looking at the Uses table of a CAD structure in Windchill, i can add the column 'Component ID'. This value is pulled from Creo, and helps me determine the difference between all the children in a structure.

I want to see this value in the WTPart structure, and I haven't been successful. I've spent too long going in circles, and wanted to reach out to the community for ideas.

(probably first issue is that i'm not even sure the right internal name for that attribute)

Thanks