Gigabyte Motherboard - USB Hookup problems

I am having problems hooking up myFront USB cords to my MB.

The case I bought is a Xion, and came with 2 front USB ports. The port from my MB is as follows:

9 7 5 3 1
10 8 6 4 2

1 + 2: VCC
3 + 4: -
5 + 6: +
7 + 8: GND
9 - No Pin
10 - Pin with No Connection

There is 2 wires coming from the front. The first one is a normal plug with 4 slots, 'VCC' then '-' then '+' then 'GND'. The other cord is the exact same, except there is a single wire stemming from the connector, also labeled 'GND'. I am not sure what to do with this extra GND cord. I tried taking a picture but it turned out crappy, but if anyone thinks a picture would help let me know. Other than that I just don't know what to do with it so any help would be appreciated. Thanks in advance!