I've been having a slow battery drain lately, and I suspected this connection after putting a meter across the un-connected battery ends and seeing resistance. The fat wires come from the battery in the cuddy, the skinny ones go to the troller. This connection lives under the port gunwale, resting on top of the flotation foam (DS2).
Despite being encased in about 10 coats of Plastidip and zip-tied together, corrosion found it's way in (the kind you get on your car battery terminals - I've already removed the Plastidip and cleaned off the white corrosion in this pic), and the positive connection (zinc plated copper terminals, SS nut, bolt, and washers) rusted. Result: a short. Not enough to trip the breaker on the battery box, but enough to draw down the battery in 3-4 days.
Even without factoring in the water I've had in the bilge, I consider it a "wet" location due to condensation. Any ideas on a better solution? Do they make some sort of crimp that would allow a direct connection? How to best insulate? The fat wires are multi-strand 0-1 gauge silver, and the troller wires are copper.
Any and all suggestions would be appreciated, thanks!