I used the same fuse block as Tony, mounted next to cranking battery and ran separate wires to each unit. That being said I would also recommend couple other tips. Use pre-tinned wire that’s sheathed together, will reduce corrosion and oxidation in wet environments, the sheath will give extra protection from rubbing and abrasions if your wire runs are not in tubes. Secondly when running new wire include some extra nylon pull strings so in the future you won’t need fish tape to run extra wires


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