hey guys i got a 1973 caravelle runabout with a 40 hp merc outboard. im not sure what year it is,but it's not the origional motor. from what i understand the boat origionally came with a 65 horse motor. im replacing all the wiring and everything. the wiring harness runs into some kinda rubber plug that plugs into the right side of the motor, and im wondering if anyone can tell me what this thing is called. thanks