Rotax 503 kill switch wiring help

[bugeyed_99]

I tried researching how to wire a kill switch into my rotax 503 dcdi as I'm not hooking up an electric starter yet. Has anyone done this, I know one wire goes to the switch from the ignition, and the other terminal goes to a ground. What I dont know is which wires(s) it is that goes from the engine to the switch. Anyone know? Also does the rotax have dual magnetos? If so would it require 2 switches?
Thanks