[artbyjody]

These are from BlueSea Systems:

Link:CableClams - Blue Sea Systems

Depending on the number of wires - check Napa for harness connections or an computer supply store for power supply connections (cut and splice)...

Or just use a bus bar to connect...(simplest actually)

 

[artbyjody]

This is the design I had on my boat before switching to the swan neck. It worked ok until water level around the mast got high enough (mostly when a big wave would come to visit, but also when pooling from rain and such). When that happened - it would leak a bit. (There was also a leak inside wire jacket which made it look worse than it is, but I found that one only after replacing the fitting ).

Perhaps putting neoprene foam (1/2") variety at the top of the cover would cover that. pressure of the foam against the wires when the cover is bolted down would compress around and at least slow down the water ingress, in this set-up....