The light switch in the rear of my D1 wasn't working so I removed it from the headliner and saw that it wasn't even hooked into the wiring. I realized that it was unhooked because the switch for the light is always in the on position. I've looked at it and can't seem to get the switch working again. Any ideas where I can get one to replace it? The two prongs is where the plastic piece connects in order to push it on and off. Thanks for any help

light from the front


close up of the switch: