I know this is a dumb question but I can't seem to find the answer. I'm upgrading to a Nvidia GeForce 8800GT graphics card on my 1st gen Mac Pro. I know how to install the card and that it needs aux power to work. The card has the aux power cable, but I'm not sure where to plug it in. There is a egg crate looking connector near the fan. Is this the aux power connector? There are two little prongs on the cable? Do these prong have to go into a specific side (i.e. positive and negative). Thanks in advance for help.