Bruce,
If possible I prefer to run the wires through the side that does not disconnect when the tower folds. If you can do that then I would recommend running a round cable right through a hole in the boat, it looks extremely clean done this way.
If you need to disconnect the wire to fold the tower and if you fold the tower often then the quick disconnect is the way to go. I prefer the Neutric/Speakon cable connecters. They are very high quality, but not the cheapest things around. You should be able to get them from Mouser, audiopile.net, or other online supplier.