First, I know the picture sucks, but you get the picture.
On the first USB plug it has
Second USB plug has
And that last plug next to the plug in the middle, is a single Ground Wire.
Now that blue piece, which I was going to plug these into, then plug into the motherboard has on side...
4 pins that read
And on the other side has
What is the NC? Where do I plug the single ground wire to? Do I need to plug it into anything?