I have 2 loose wires behind radio that r not connected it looks like they came out of the back of a harness I just don't know which one the wires r blue and green and blue and light green they r not in a bundle with any other wires can anyone tell me what they go to thanks

 

It should be the radio dimmer (which most of the time is not used with aftermarket radios, and a head light dimmer, which again would not be used. I could be remembering wrong though. If everything else matched up to somthing and works, that should be it.