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RMCHRGR, I see some of your confusion in what you are saying.

A) what you have is a 2 pole switch (4 post/connections) which is a DPST. think of poles as switch contacts.

B) The small pole of the switch you have is only rated at 20amps, this will not handle your ALT output. But will work to break your MSD small red (turn on)input or other small loads like relays

C)The more relays and connections you have the more places it has a chance to fail. Which normally happens when it is most inconvenant.

D) Any time you have a relay energized it will draw power. So if you wire a relay that is controlled by your disconnect switch you will have to turn off the switch when the car will set, or it will drain the battery over time.

There are alot of ways this can be done. Try to make it simple.



B) or use the on/off to break the main power wire to the MSD. That way you don't have MSD on at all times when the switch is in ON position

There is the minimum standard to pass tech, which is when you throw the switch it shut off. Then there is better than minimum. I like the diagram I posted. It's simple and keeps all wires that are hot within a small area of the trunk, no hot alt line (which will pass tech), nothing going to the front will be hot.

Trunk battery Kit, a ford or jeep style solenoid for starter and a continuous duty relay for the alt line (do not use a ford starter relay for alt line). Even if the alt line relay fails, I carry a jumper wire to bridge the CD relay so I'm no worse than the alt hot line style of wiring.