Anyone know on a the 2008 Indmar Assualt(325) in a 08 LSV if the voltage regulator senses on the large starter and ground wires or if it senses off a smaller wire from the wiring harness?

My starting battery is up over 16 volts now and my Blue Sea ACR is now not combingin due to over volt. I have all wiring (stereo, main acc buss, etc) hooked to the second battery except for the large starter red and ground black.

Blue sea thinks the voltage regulater may be sensing over the house acc wiring hence frying my starter battery. This makes sense(ha ha) if the sense comes from the house or acc wiring but I seem to remember on my older moomba LSV that the voltage regulator sensed over the larger wiring so am perplexed.