Non working radio and odometer malfunctioning on 2002 Pontiac Aztek

I have had issues with the radio/cd player not working. I have noticed, that if I move the battery cable in a certain way, the radio will start working again. Only to cut off after a few seconds, after the seat beat waring ding. In the past month, the odometer has went from on and off, to off now. It seems that it had the same issue as the radio. What's my problem? Is it easily resolved?

Asked by for the 2002 Pontiac Aztek