Could someone please tell me where you put the circuit breaker and where the power is connected to pick up the 12 volts to the switch on a 67 vert. I am not sure where the circuit breaker goes in the wiring harness also, I assume it is between the 12v source and the switch. Also can I use any 30a breaker on this or is it a single use breaker only used for this. I am making my own harness for this so I don't have anything to go by and it was not with the car. Thanks EB