It appears that's just got +5V and +12V, if the wiring colors are yellow and red for those two wires.. The rest appear to be ground.. You could adapt a regular molex to that quite easily.. Just cut ...

My old PS went wacko and burned one of the pins on my ATX connector. It's still there, but it's a little deformed. I have since unplugged/replugged different connectors into it, but had to force them.