you mean a switch to throw so that if somebody were to try to crank it, it wont crank? or the NHRA style switch on the back so that if the car wrecks they can turn it off?
in either case its just a switch. it has power and ground and closes the circuit when its on. thats easily googled if that didnt make sense. the circuit you pick to put it on should be one that will kill the car - such ...



