At the moment I am installing CCFL ebay headlights. Down time right now since friend is going to the part store to get hyper white (turn signal bulb). But as I was looking at the back. I was wondering what these where? I know one is a ground, probably for the halos but for the people that have installed these, where did you ground it to? And one I just don't know what it is. I circled both in yellow.