Have any of you installed a USA630 stereo in a 1979 camaro? I'm attempting to install one in mine and having some problems. I'm not sure if I've adjusted the posts correctly as they are sticking out far away from the radio face. My main issue though is that the stereo will not turn on. I have attached all the wires except for one that says it must be attached to a constant power source for the clock and system memory. Could this be the problem? A second wire that only supplies power when the vehicle is running is attached. I'm not sure where to attach the other wire too. My other thought was perhaps I did not attach the ground wire to a good location.