Fitting early 6 volt coil to frame ser 3

[Martin s]

I'm looking for how to attach an early 6 volt coil to a series 3 frame what has the earthing pad and brass fork like a series 2. I have the earthing pad, right angled bracket, coil bracket and the brass fork. It's nearly 30 years since I dismantled one and can't work out how it goes. I have the exploded diagram but it's not the best descriptor cheers.