Wiring my new boat. I have 2 fish finders, 1 elite 7 chirp, 1 elite 7x. I want to run both at the helm at times, move one to the front at times, move one to the back at times. My question is that's 4 power cords, Could I run lets say 1 pair of 10 gauge wire and drops for all 4 power cords or should I run 4 separate pairs of wires?