GGG Electric Ice-T Trackball Question (wiring)

[Underhill]

I've searched all over the forums for an answer to my question but to no avail.  I'm posting here since I'm hoping to get a quick answer from someone that happens to own an Electric Ice-T trackball.  If not I'll shoot Randy a PM or email.

I have a GGG Electric Ice-T Trackball (USB) and have everything wired up to the LED Wiz +GP.   The wires coming from the trackball itself are all connected to a small circuit board but one.  The one that is not I am assuming is the ground.  It has 2 green wires really but both are going to 1 ring terminal connector.  These are the wires coming out of the trackball housing itself NOT the rgb lighting.

My question is... What do I connect the green wires to?  Do I need to connect it to a ground on the PC (not sure how to go about it if so)?  

Thanks in advance.

[fallacy]

I did not connect the ground to anything. It is basically a USB mouse why to I need a ground for it 

[Underhill]

Sounds good.  Thank you fallacy.