I bought a Promariner ProNauticP Series 1240P 3 bank charger to replace what I guess is the original old faded blue charging unit. I’m not sure if the original is a single bank that connects to a bus bar or something? Haven’t looked real close yet. I just wanted to drop in here and see if y’all can offer any advice and or gotchas I should be considering before going down to the boat. For example, I have a huge 8D battery on port and one on starboard and a regular starting battery for the genset, but I have no idea how they are wired. Does the genset battery usually get a charge from a charger? Are the 8D’s separate or connected? Any and all advice appreciated. Thank you.