73 Duster electric (element) rear defogger

Hey guys, wondering if anyone has a wiring diagram for a 73 Duster with a electric element rear defogger.

Mymopar doesnt show any A body with one on their diagrams.

My wiring has been hacked and slashed and i am replacing it, the wiring wasnt there for it when i got it, and there was no switch for it on the dash, any pics of this also?