Have noticed since I got this car 3-4 years ago that the rear defrost sucked. Seemed like it only did half the window. Well, I am in the process of recovering all the door panels and rear shelf. Took off the pillar covers to get at the rear shelf and found this wire hanging. I know the PO had the headliner redone. I looked all over for something that would plug into this loose wire, but couldn't find it. Any idea where it should be coming from?