Careful which white wire you connect, one is for a switched ground that cuts off the ignition ie a kill switch; the other goes to tach. The tach plugs into the front. The white wire that runs with the red and others is for your kill switch. Don't hook either and try it. You will get fire only if the white wire isn't grounded (like laying on the fender well?). After you get fire, use the white for a kill switch and hide it somewhere.