A Body WAGONS-Ho! A body Wagon Thread

I'm needing to access the wiring for a 66 Dodge Dart with a power back window. Where does it run? There is no dash in the car and no interior in the car but I cannot open up the tailgate because the back window is up and I have no way to get it down. I figure if I can access the wiring, I can put power to the wires and see if the rear window motor works. I'm wondering what to do to open the rear window if the motor doesn't work. Any ideas?