Hey Maine, I have a friend who needs the factory wiring diagram for his boat, You wouldn't have one kicking around would you? I see that a voltmeter was installed perhaps original that has 2 3position momentary switches that allows for viewing of each of the 3 batteries installed(2house and 1 start) and a myriad of wires that go directly to the batteries. I am going to clean it up for him and install a Xantrix monitor. A diagram would be good. All of the wires have been numbered from factory and we've figured out some of the additions. Thanks.