Headlights switch issue?

So I have read that 2nd Gen dodges are notorious for headlight switch issues. I have parts to fix it. But my problem. Is that the harness got so hot it melted the wires completely out of the plastic piece. And I've only got just wires behind the switch assembly
Amd for the life of me can't figure out where do they go. As in which colored wire goes to where. The back of the switch has letters on it like "D", "U", "B1", and so one. I need it broke down to me in baby terms is the best way to put it. I need to know if the greens and red wire goes onto the "B1", or if its the pink and purple wire, and so forth. Any help is apprechaited.