John the Ghost installation manual doesn't mention a main battery disconnect switch to be turned off, or a trolling motor plug to be disconnected, when charging the trolling motor batteries. I can only assume that the Power Button on the Ghost trolling motor pedal is a suitable "disconnect" means for charging trolling motor batteries, do you agree?
According the Ghost installation manual....
"Connecting the batteries
! Warning: The positive supply wire (red) should always be connected to (+) DC with a fuse or a circuit breaker (closest available to fuse rating)".