ok so i recently purchased a Gigabyte GeForce GTX 970 WindForce OC 4096MB GDDR5 PCI-Express Graphics Card and went to install it with my other graphics card. now im no expert, heck im a noob at these things, so i followed the instructions but i couldnt find anyway of plugging my new graphics card into my power supply as the graphics card came with 2 sets of cables but nothing for them to plug into, there was an open socket in the back of my power supply but its like there was a component missing. unless im completely clueless and am missing something here or i need to purchase some form of cable to connect the missing links?