As Morris states, if you do not wire the battery disconnect with correctly, when you engage the kill switch on a running engine, it will keep running. The first time that I wired the kill switch I tested it on a non-running engine and the engine wouldn't start and I thought that I had done it right. Then when the SCCA tech session came and I had to use the battery disconnect to stop a running engine it did not, as the alternator kept the engine running.
Back to the paddock and time to re-wire. Not making that mistake again.
Jim