Proper installation of remote battery disconnect switch.
putting the alt + to the battery side of the master will satisfy tech inspectors at most tracks and kill the motor when the master is shut off.
BUT:to make the setup completely safe and cut all power to the front of the car to kill any potential for sparks and fire, a relay in the alt + wire that is powered by the car side of the master is needed. when you turn the main off, power to the relay is cut and even the alt wire to the front of the car is dead. when you power on the master, the relay is energised and the alt is now live. all this can be done in the trunk by the master. painless makes the relay for this. BUT this means you must use the master when car is parked, or you will kill the batter by keeping the relay energised. for track-only cars, doesnt matter. we turn it off out of habit when we get out of the car.
so, street car, probably just do the master cutoff. tech guy will be happy. worried about completely cutting all power to the front of the car in an emergency, go the relay route.
S/ST 1818 S/P 1018 H/R 1564