Sorry but the service manual would be where that information is kept and it is not in the public domain and therefore won't be shared or linked to by anyone here on Tom's as that would constitute Piracy which we do not condone in any form.
You will need to see what wires connect where and create a wiring diagram yourself. IE - Follow the wires from the power switch down to the connector and mark the appropriate pins on the motherbd as being the power pins. Lets see, there would also be Pwr led, hdd led, and maybe a reset switch at minimum.
This thread is now closed. Good Luck.