Yes i believe its the 20 pin power connector (sorry i don't understand a whole lot about computers lol). There does not seem to be space behind the motherboard.
At the moment, the 20 pin power cables do not seem to budge as it is tied to the HDD tray. So im worried if i put in the 6950, will there be enough room for the 20 pin connector cable to go around the 6950 and reach the motherboard. i don't have any concerns regarding the power cable reaching the card. I can said a photo of it to your email or something so you can see? Thanks for the replies btw.