I'm guessing you already cut the original colored wiring off the original connector?
You should be able to figure them out.
I may have an old one lying around.
You should be able to identify the circuit breaker feeding the switch
Only one blade will show continuity to that with the switch in "head"
Here's a partial of a '72:
Top left, switch marked B2, wire marked L8-18P is power to switch from tail lamp fuse
Top right, marked D on switch, with three wires leading off, feeds "dimmed" power to panel lamps
Bottom right, marked "inst" on switch, is power feeding IN to switch from instrument fuse
bottom center, marked R on switch, two wires connected, l7-18bk, is power from switch going to parking lamps and tail lamps
Bottom left, marked B1 on switch, L1-16BK goes to main in harness splice. This is UN fused power coming into switch which feeds the switch mounted breaker for the headlamps. I see no reason, if you want, why you could not add a fuse in that circuit. If you use headlight relays, use a small fuse, because you will only have relay coil power on this lead
Center marked H on switch is what else, switched power which goes to the center of your dimmer switch, feeding on to the headlamps.
If you find the thread a few days back involving Abodyjoe (I think) there was a COMPLETE 72 service manual posted, which is where I posted this diagram from.
posted here:
You'd be wise to download it.
http://www.forabodiesonly.com/mopar/showthread.php?t=132309&highlight=service+manual
