What fan header do I plug my cpu cooler pump into

[AJ O]

I just got my parts for my new computer build and i've run into a slight snag, I have a NZXT Kraken X40 and a Asus Z97 Pro Motherboard, I can't figure out which fan header the pump needs to be plugged into to run correctly.

Any info on what goes where would be greatly appreciated

Thanks

 

[BleedingEdgeTek]

The fan plugs into the silver colored CPU_FAN header at the very top, and just below that is the 4-pin fan header labeled CPU_OPT where you would plug in the pump