need more info mate , not many wires on them apart from the Coil lead to the plug or the engine cut off button on the bars, that has 2 wires . 1 is Earth to the frame the other wire comes out from the coil.
Some Engine cut off buttons earth directly under the button its self , straight into the handle bar. So in that case you will only see one wire from the button too the coil.
So what is the problem your having, maye be something simple ?