What's the thing called that wires run through between the door and the body of the van? Door jamb wire connector?

I'm installing power door locks in my van, but don't have a way to get the wires between the body and the side door. Is there a GM part number so I can order one?

 

All you need to do is call a dealership parts dept, they can tell what is used in \vehicles like yours, how much $$, availability and part #/

 

Apparently they used a contact plate, not a boot. Might be tricky to get that to work.