One of my parts car has vanity mirrors on the sunvisors. I have traced the wiring harness on the interior down the B-pillar to the point where it looks like it goes in to the harness for the trunk and tail lights. I know this is wishful thinking but might that harness lead that goes to the dome light and the lighted vanity mirrors just plug in to the interior harness or is it all one piece. I'd like to put the vanity mirrors in the car I'm driving but not if it means I have to swap out the entire interior harness. Anybody know?