I appreciate the reply. It does appear to be a straight factory setup, although without an owners manual or a wiring diagram it is impossible to tell. I installed an on-board charger for the trolling motors on my last boat and intend to do the same on the Nitro once I am certain there is not a conflict. On my old boat, the installation of the on-board charger involved running the black and red wires from the charger to the trolling motor batteries. Since no such wires exist on the Nitro batteries, I'm guessing I do have to charge them independently from the Nitro's charging system. Just wish I had a manual or at least a wiring diagram to confirm.
Thanks