Hi, i am looking for ASP-270 pinout, it`s 4 wires, from right to left

5V
GND
GND 2 or button???
GND 3 or button???

How can i start the ps3 with external power, i have 12V and 5V, i connected the 12V to the two pins under power supply and 5V with 4 pins connector. I saw that fan started to run and stopped.

Thanks.