Hoping someone out there can shed some light on this, as it one of the puzzles left to solve. I've heard many raw thrills games use this harness, but I can't find documentation anywhere which describes this internal wiring. +5V standby would seem to be (by name) connected to the +5V Standby line of the power supply ? But then what is +5V switched ? In particular it has +5V Standby, and +5V Standby Switched. I'm thinking it probably connects to mainboard headers and a 4 pin drive power connector inside. What I'm unsure of is this internal wiring. The wiring on this is labelled, and I know it takes at least 5V from the host PC. The watchdog/reset board has a cable that runs to an I/O slot on the PC. I have the manual which includes a wiring diagram. I'll use a HD TV initially for a display.

I've determine an Optiplex 740 is used, and I happen to have one. But it did come with the USB security key. The cab came sans guns, sans monitor, sans marquee, sans subwoofer amplifier board, and sans PC. So, I'm the proud? owner of a 42' Terminator Salvation Deluxe.