I ended up only going around my spark plug wire once,any more than that and my readings would double.Must have been stray voltages somewhere?(rectifer maybe).Just ran the wire through a rubber gromet in the front of the motor,found a good ground and twisted(the red wire)around the spark plug wire.
If your talking about the display,I mounted mine right on the handle of the outboard,in the front.I'd take you a picture but it's pouring right now,maybe later.