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Why use those connectors?? I water tight the cord thru the box and eliminater that problem. I just unplug the battery from the inside the box,(which is stowed below deck) after the day of use open the batery box, and air dry overnight , been using this system over a year and not 1 sign of corosion ,even from the battery. I use a different dry box than Pelican and it's way cheaper and watertite..( after all your not exposing it to any great depths or elevations, just some splashed water and dampness) I use the greese on the above deck connection bi-weekely and no sign of corrosion there either.
When I add a light for nite adventures I simply run the wire thru the same opening on the box and no leaks, and no corrision on the switch, installed above deck for light and sealed with 3M 5200 marine grade sealant fast cure. simple........
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