the the two black with orange stripe wires are one the harness going into the alternator. the one with 3 wires i believe. cut the two black wires off about 2 inches from the plug that goes into the alt. attach a 2 gauge wire to BOTH the black wires coming off the alternator. run this cable to the POSSITIVE side of the kill switch. also to the possitive side should be a wire coming from the possitive battery terminal. on the other side of the kill switch is the wire that runs to the front of the car to the solinoid. the negative from the battery should be grounded to the back or to the block, your choice. i ground in the back. the third wire on the harness you cut should be left alone. put some tape over the black wires that you cut off so they dont short out.
i dont know anything about a circuit breaker that Black 93 Fox mensioned, i dont have one any my kill switch works fine