I bought an older SR Amberjack that has been retrofitted with Mercruiser Bravos and 383 Strokers with Thunderbolt 5 ignitions. The AJ has had 4 or 5 owners over lifetime. Past owner couldn't identify what is in photo. I believe it is a motor audio alarm? I believe person who installed TB5 ignition disconnected it, but I am really not sure. If anyone has schematic of what wires go where, please provide. There also appears to be two three wire plugs (assume alt. oil and heat switches), but I am not real certain how they connect. Help!