psu and case fan, don't know what to do

[SirSamuel]

I have a molex plug hooked up to my nzxt phantom 630 cases plugs. And on the end of the molex plug it says Perif. Where would I plug that into on the PSU?

 

[ubercake]

The power hub for case fans is on the back of the motherboard tray. It has a cable running from it that connects to a 4-pin molex on your PSU.