Oops, he does mention this:

I made an ATX extender cable and modified the 2 wires required using a previous mod guide, and secured the new cable to the logic board tray.  This allowed me to use an off the shelf, unmodified ATX power supply that should make replacement easier in the future. 

Still, going by what I've found so far, it looks like you'd have to modify more than 2 wires, as the MDD psu is 24 pin.