I just got this boat and noticed that there is another spot for a second battery. There are 2 black wires with blue lines coming from the bow. Are those both Grounds? Can anybody post pics on their dual battery setup?
Is the boat equipped with a trolling motor? In that case there should one red and one black wire leading to the bow area. If so there should also be a receptacle up there somewhere for the trolling motor to connect to. At least that is how mine is set up. If you search the major marine electrical component makers web sites (Blue Seas, Perko, Guest) they all have reference diagrams for this type of set up.