I have a 1966 33HP evinrude motor. I figured out everything besides the two wires the guy I bought it from said was kill wires. How would I wire then so when I turn my switch off it kills the motor. My switch has three prongs and its off, on and start. There are two black wires on the motor and theguy said they are the kill wires. How would I wire it? Please let me know. Thanks