I need to make a converter (can't be bothered to go out an buy one) there are 3 yellow cables going into it, and 3 black (i guess ground?) Just wondering if it matters which do what? are all the yellow 12V and all the black 0V/ground? I've ripped the PCI-E off my old tagan PSU, and don't want to take the binding off the cable, do is there anything specific i need to do to make it? Cheers