It seems that I have a battery going bad. Where can I find a battery layout diagram
For my 2019 fx21? I just bought the boat & don't know which batter is which.
4 battery setup w 36v trolling motor. I've got 1 blue top optima(bgi31), 1 Walmart
Everstart(27), & 2 interstate(27).
Left to right from rear.
Interstate, interstate...charger...Bluetop, everstart

Thanks for any help or guidance!!