I know this is a brain fart but I have to ask. The original am radio for this truck came in a box. Radio, twonutsfor each post and the knobs. Is there a plate missing or mount for actually attaching it to the dash? If installed as it is it would just hang by the control knobs. Dash hasn't been cut. The rear bracket screw is there. Chilton is no help and it has been a few years.