Name of the variable holding the connector_id?

Hello

I need to create a list of all the electrical connectors in our wiring system.

I can generate excel file that show the part name and their geometric positions.
However I need to add a column to show all connector_id’s.

Can anyone tell me the name of the variable that holds the names for the connector_id’s.

Ps.
This is “connector_id” value that can be assigned to parts in the electrical application.

Thank You

Richard