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No one has anything to say about the tricolor thru-deck electrical connection and what should be used for a coaxial cable?<<

Well, Stargazer has the thru deck fitting for the lights..my radio is a hand held. Possibly there's a fitting available, but Idano where to look for it. West Marine has a website and tech support land line...you could try them, as they now own BoatUS stores as well www.westmarine.com or 1-800-262-8464 Harvey/ Ga M-17 Stargazer #294