Which fan plugs into pwr fan

[megamanx2]

i have 3 fans in my computer but i dont know which one plugs in which in the mobo

on the mobo i see slots for

PWR FAN

CPU FAN

SYS FAN1

SYS FAN2

which one go where, i know the fan on the cpu goes to cpu but what abput the other two?

I have a fan in the back of the PC and one in the front

 

[Paperdoc]

CPU fan is CPU cooler, as you already figured.
The two SYS fans are for case fans - you have front and back.
PWR Fan is for the fan built into the power supply. Some of them have a fan connector on leads coming out of the PSU, others do not. If you have it, plug in to mobo here. If no PSU fan connector, do NOT connect anything else to this mobo connector.