Tell us about your boat, what you're installing, the timeline, and perhaps your budget.
I'm close to you, but my skipper may have a problem with me going near someone else's boat.
j/k. PM me and we'll see if I can help you. I teach electricity, wiring, troubleshooting, installation, theory, etc, at a large, local company.
I am a State of Oregon certified Journeyworker. For Locomotives.
btw, I love wiring challenges.