My 1979 Blueband 20hp has no kill switch and I wish to install one. I've got an aftermarket kill switch (Marine Works MP40970) where the lanyard has to be in place and pushing down the button for the engine to fire. It has four terminals, 2 NO and 2 NC, what is what?<br /><br />Think is I can't see any wires to connect to?<br /><br />I've got the Seloc manual for this motor, can someone maybe tell me where it is in there? Or otherwise give me a fool proof guide of how to do it? 