NIDEC Fan where do i plug it in?!?!

Hey, im setting up my Vcore3, and ordered this part colling fan:
4028 Axial - NIDEC W40S12BS2E5-57T04HF9 (12V 1.61A 25000RPM)
But where the heck do i plug that in? The diagram in the instructions shows i should plug it on my Octopus which has a completely different connector. The Fan has 4 Wires, while the connector has 2 wires.
The wiring kit I got did not have wires for supplying power to everything. Is that normal?
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