AX750 doesn't fit my board [Solved]

Hey, I got an AX750 for X-mas. When I put it all together I realised that NONE of the included cables would fit my motherboard CPU power, they all have the wrong arrangement of pins, I read the manual and it had nothing, my old OCZ 650W had the correct pins, it's an 8 pin connector, but the one on the AX has either rounded where there should be square pins, or vice versa.

Really frustrating, any one got a fix?

*Edit, if it helps my board is a Gigabyte Z68XP-UD3P

Sure youve oriented the connector correctly ?