Charging system and other wiring change help needed

There are several ways to wire up a 4 post (2 pole switch). All that I've seen have two heavy terminals, and two lighter ones.

If you have EFI, or MSD ignition, "it's easy." You just wire your "ignition run back to the disconnect, to the small terminals, and back up front. You use that wire to kill the EFI, or to kill the MSD box "the small red."

If you have some other ignition, you can use those terminals to operate a relay which fires the ignition system

If you have an external voltage regulator, or a "3 wire" alternator, you can use those disconnect terminals to "kill" the VR exciter wire.

This will insure that when the switch is pulled, the engine does not "run on" with the alternator, and kills ALL power.

I know crackedback^^ above has an alternate scheme that he's posted.