I think on the 2 wires, one to goes the key and one to the kill button, both ground the coil. Look at both wire and onr might be the return from the kill switch and is grounded at the coil.
Almost finished with my x5. Using the started button as a kill switch worked out great. TY.
Its not an X3,,My picture is a real X5.......Yeah that's my x5 as my avatar. Right side chain drive with the Cctv trans. That x3 in your picture doesn't look like my bike. Different body,exhaust, trans and chain drive. I have mine almost all together with most of the body parts on it. I'm missing the side plastics. I gotta work in my carb . It only runs when the choke is on and the throttle all the way open. Even then it wont stay running. I don't know what's up with it. It was running great yesterday.