Wiring questions. I have a new to me 1991 lund that I would like to straighten out the wiring on. It has a marine starting battery hooked up to the Johnson 150 and and a deep cycle hooked up to a yamaha 9.9. It also has a 12 volt electric trolling motor thats not hooked up. Should I hook the gas motors up to the starting Battery and hook up the electronics and 12 volt electric to the deep cycle and use a perko switch? I also was thinking of adding another deep cycle and onboard charger if needed. Thanks