Also you'll need a crimper tool and a couple boxes of butt connectors red and blue and go rock'in - if have an old throttle cable the inside SS wire is what the marinas use a feeder cable - but just duct tape some new ones to the old and feed them thru a couple at a time - 2 people works best
be sure to pull 2 extra pairs (4) wires through when you pull - makes adding stuff and/or replacing a glitch easy - you will need to get a piece of wire with an alligator clamp for the negative side of your little tester to get to the bildge area - you need to make sure you are on a GOOD ground under the console or battery.
If your fat and old like me, get everything down in the boat so you just have to roll around rather than get up
