Currently installing a new head unit in my buddies 00' Dakota. The stock harness does not have a ground wire and you are forced to find a ground yourself. I swear his entire truck is plastic. I can find anywhere to ground the HU. Wondering if it would be sufficient to ground it on one of the bolts holding his front seat down? Seems like metal to metal. And I don't want to have th hassel of wiring through the firewall. Trying to kepp it simple her any insight?