Its an electrical componant and requires power, the power comes from the PSU not through the connect interface, so you will need 2 x 6pin PCI-e power connectors which that unit does have. The PSU will have PCI-e on it so you cannot mix them up.
If I am not mistaken that Unit will have on a single power thread a 6pin and a 6+2pin so you can just plug in 6+6 and on your way.