Hey Hotwheels, the center post gets the large Black w/green stripe wire with nicely molded ring terminal. Looks like a fusible link type but I can't tell just by looking.
Sorry I can't post the diagram for you.
There's a separate Purple (or Purple w/white stripe) wire with it's own plastic push-on connector that mounted to a separate pin on the side of the switch, outside of the area covered by the main plug. That's the dual-brake warning light circuit.
The other three wires should be mounted in the plastic main plug. A single Yellow wire is connected to one terminal. A single Red w/blue stripe is connected to another. And a two-wire plug with Red w/green stripe (or possibly one Red w/green and one Green w/red) goes to the last.
I just re-did those connectors while helping a friend replace his switch, and we drew a diagram. If you need to know which position each of those goes to, I can see if he's still got it because my memory is just not good enough to remember the positions in relation to each other. Sorry.
Did that help at all? Are you replacing all the wires to the switch?
This brings up an issue I have with the wiring. I thought I'd post the question somewhere, so here seems like a decent place.
How come the Black w/green wire going out to the accesories is a big 12ga (?) wire and the main power in to the switch is this little piddly 16ga Yellow wire? Shouldn't the wire that feeds ALL the other things at least match the bigger one? Or am I reading the switch backwards? I thought I was at first, but the way it acted, the tiny yellow wire is the only hot wire coming to the switch. The rest are hot "out" only. At least on this '70 I was working on. Wierd.
Thanks for any insight.
Paul