I follow you completely. I have the same plug setup as photo #1. Over behind the driver side door jamb is a bundle of wires I figured was for the door jamb switch. Looks just like the wires in your photo #3. Where is that plug? Inside the door jamb sheet metal? There an opening in the sheet metal by the door jamb, that's where my wires are. I'm not worried about making it work, I have no problems connecting to an existing lighting circuit, I just hoped to just plug & play. 'll post findings later.
Thanks!
Tommy
Thanks!
Tommy