GeneL: Haven't tried this, but you can try taking it to an electronics store and test mating connectors to see if you can find one that fits tight. If that doesn't work, or sounds too touch and go, you can also snip the cable off, and either solder a better one on (since you can solder battery tabs I see no reason you can't solder that connection live - but the risk is yours) or solder direct. The middle solution is probably the one I would pick in order to keep the battery and have a reliable connection.

Tor

P.S. I haven't forgotten about building my system. I got a different job than I thought I would, and haven't had to do much evening/night commuting, so the project got put on a slower track than I planned.