PS3 PSU with 3 PIN connector - ATX PSU MOD

Hello guys! I am working on a PS3+X360 in a PC Case.

However i am having a hard time figuring out the pin outs as the PS3 of mine has a 3 PIN connector and i haven't seen any tuts around regarding the same.

I would like to use a single atx psu for both ps3 and xbox 360.
Any help is greatly appreciated.

 

Do you mean the main power plug of the fat PS3? That's just the same power cord as used on a PC...