Headlight wiring

I've searched the net and searched my manuals and cant find a good clear answer. On my 71 scamp. I am trying to wire up the headlight plugs, I have a Red wire, Violet wire and Black wire. Im not sure which wire is the high beam and which is the low beam. Or as your looking at the back of the sealed beam headlamp, which is which? Can you guys help me out. Thanks