Gigabyte GA-MA785 power supply question

[hiwyrobr]

I have a raidmax windstorm box, with 500W PS, my power supply connector for 12v only has 4 pins, not 6. How do I connect it?

 

[hiwyrobr]

I meant 6 pin instead of 8. I am assuming I connect with the 1st 6, which includes 4 grounds and 2 12v pins