I have an 80's model 90 hp inline 6 Mercury and was trying to get boat running to sell and discovered some decaying wires that come from up top and lead to to a little box with three connections. I can crank the boat fine and it runs fine on the water hose . was wondering what these wires are for and are they for the trigger assembly (I think). Didn't want to carry to shop if this is something I can easily fix myself. Need some help.