i can't answer this one directly, pictures do help though...
One thing i have learnt though, is that some boats have lots of switches and wiring, you'll often find that some parts are completely redundant!!..? Worth chasing with a voltmeter with different switches / ignition circuits made? Mine has about 4 switches on the dash that do nothing at all, seems after investigation they were built in as optional extras for the owner to use as necessary.
Don't apologise for asking questions, that's what forums are for...
