I will be adding a Sony CD Marine Stereo to my Champion. I am running a 2005 225 Optimax. I have 3 batteries: All are deep cycle, 1 for starting and 2 for my 24v trolling motor. I am concerned about connecting it to my starting battery, and after playing the stereo for whatever amount of time, that there may not be enough cranking amps left for the Optimax.
What wiring possiblities do I have??