I put together my first computer last night! Well, kind of, I still don't have a monitor or video card

One thing that confused me a bit were the front panel USB connections. I have a 4 pin connect (Vcc +/-, Data +/-, Ground) which matched up fine on te mobo, but what confused me was there was an extra split from the cable with a 1 pin labeled "ground." Do I plug that into the extra ground pin?
Hopefully, I can swipe my dad's monitor tonight and see if my machine works. Then, it's off to newegg to get me a 9700 Pro AIW
But as of now, it sure it purty to look at