Kitty Cat Snowmobiles

From the coil of the engine I have a black wire and a yellow wire. From the key there is two black wires coming out of it. From the kill switch there is also two black wires coming from it, one looks like it should go directly to the chassis to ground. How do I wire this so the key and kill switch work?

The black wire from the coil goes to one wire on the key switch, the other wire from the key switch goes to one wire on the kill switch, the other wire from the kill switch get grounded. The yellow wire from the engine is for a light.