I have minimal electrical needs on my boat. GPS, VHF Radio, Depth Sounder, run when cruising by sail or motor. At night at anchor, power needs are the Stereo, an anchor light or the VHF to check weather.My iron sail (a honda 15) can be hooked up to the battery to charge around 5 to 6 amps. I have two series 24 marine batteries and a battery switch. I want to be able to apply a bit of charge from the Honda to either battery and I want control of which one is being charged. (FYI, I have a shore power charger when in the slip to "top" things off before settin out but I know how to hook that up). My question. Can I just hook up the positive lead from the motor to the positive output terminal of the battery switch so as to control which battery is recieving the charge?Tanks in advance!