Kill switch master disconnect cut off ???

Most other auto racing sanctioning bodies and I think, all aircraft, are wired to kill the ground, or negative side of the system. I can't say for sure but I assume that NHRA is sticking with the OLD way of doing things, to avoid confrontation with the racers.
Switching the negative side stands less chance of causing arcing(read;fire), the same as taking the negative off your batteries, first.

That was kinda my thinking, most every instruction you see says disconnect the ground before doing-- whatever.. I like my Hot run straight to the starter as possible without a bunch of breaks in the connection, I think I see what stroker is saying, flip the switch kill all the power to the system, kill the engine.. That makes sense...