I have a 1978 20hp mercury with controls. Does anyone know where or what wires to connect a universal killswitch. I have wiring diagrams and one seadog killswitch.I would like to hook it up to controls but dont know what to do with switch. If i go to motor i will need more wire, more wire more problems. Seadogs websight has no information. Switch has none either it only shows ignition or magneto connections .thanks