I'm installing a Kenwood single din stereo and I need help !
 

I bought a kmm322u bt Kenwood single din stereo, I'll take pics tomorrow but there's a lot of harnesses that came from the 2012 coupe Z with nose without nav that dont have anything to plug into the new stereo, so I guess there going to be dangling in the back?

More importantly, does anyone have a picture of where j can ground the black wire?