Well turns out re-seating it and cleaning it made the original plug work and I stuffed it back in. But yes it had 4 soldering lugs on the back, although of course there are only 3 conductors to the actual plug. Or maybe I was too tired...
Oh, I had thought you meant it had some kinda
actually 4-pin jack like a balanced connection or
some kinda special fitting. And even those are
usually 3-pin XLR/mic fittings. Anywho now you
know how to clean and tighten the jack. Coolth.