How do you wire an msd box with a battery cut off switch and have the car shut off when the cutoff switch is flipped off. When I bought the car the msd box heavy red wire was hooked to the back of the alternator and the cutoff switch would kill the car. The msd instructions say not to hook it to the alt, I figured that is why the original box I had died. So I wired it to the off/ disconnected side of the cutoff switch and the switch wont kill the car. My car doesn't have the stock wiring but it is wired battery to the cutoff switch and everything comes off of the disconnect side of the cutoff switch. Any ideas would be great. I have tried msd's instructions of using a 4 pin ballast resister on the small red wire on the box and it didn't help. I also tried the msd's big wire to the battery directly and it did help. Im just afraid to rewire it to the back of the alt and have another box fail. If it matter's its a 2 pole cutoff switch.