I want to move my battery from the stern of the boat to under the console and also get a second battery with a Perko 1,2,All switch.
Also, I only want to run one battery cable (dual) back to the engine. I have looked at the Perko wiring diagram. Fairly straight forward.
My question is - What is the best method of combining the ground connection from battery 1, 2 and back to the engine?
thanks

84’ 18 Privateer
08’ Yamaha 90
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