I have a 2010 Prius II, and I had upgraded the stereo. I had been informed by stereo shop to upgrade the stock ground cable to a 4 gauge, so it'll have proper setup for my stereo. Since prius uses small size battery post on the 12v battery, I am having hard time finding the correct battery post to custom make a ground cable... Does anyone have any solution to this? Any pre-made cable is fine with me too.
I have the same problem. It would be good to have someone give some insight on this. Perhaps a wiring diagram?
