when I bought this bass tracker it only had one battery but 2 battery compartments picked up adeap cycle battery installed it,question is how should I hook up this battery to work with acc,trolling,lights,stereo,bilge pumps ect all this was on 1 battery.
Thanks
Back in the early days of the trolling motor, I bought one and no extra battery for it's operation. I soon learned that hand cranking a 70 hp (at the time) engine by the pull rope was not the thing to have to be doing. The engine gets the "cranking battery". Everything else gets the 2nd battery which needs to be a "deep cycle" type, usually size 27 and connects to everything other than what the engine harness connects to. WW hasboth and today you can buy a combination but if you buy one thinking the one battery will work for all applications, forget it. The battery only holds so much energy and if you use it for your trolling motor regardless of type it won't "be there" for you when it's time for engine starting.
If you are running OEM gauges, like Merc and Quicksilver with Merc engines, you don't need to fool with them as they are plumbed off the engine wiring harness. But for trolling motor, depth finder, running lights, anything else you decide to add to your boat requiring 12v the 2nd battery is to operate them.
The engine voltage rectifier/regulator is designed "to keep a charged battery charged". It is not (normally) designed to keep a deep cycle, deep cycling as you run power out of it with your trolling motor. However, to support the Bass Boating population 40 amp rectifier/regulators were made available on larger engines (150 hp up) that were designed to assist in keeping all your batteries charged while on an outing like during tournament fishing.
If your second battery isn't adequate for your "extra" needs, get a 3rd battery and wire it and the 2nd in parallel (+ to +)......no connection to the engine start battery.
Obviously when you get home the 2nd and if used, 3rd battery will need charging. Some boats have onboard chargers (usually dual with 5 amp outputs) built into the boat that are handy. Otherwise 2/10 amp chargers are readily available that run on 120v.
HTH.
and assuming a 12V trolling motor. While fishing the trolling motor is used. End of day, load boat on trailer, go home, plug battery charger in.