It's a pretty grubby cable and it's already tight but imma try to just lop off thr old terminal and bolt a new one on. The problem with the bolt that it's grounded to is that I just can't get to it! I'll post a pic when I get home. There's an aluminum coolant tube (looks like it goes to the heater core) and a metal fuel line (maybe?) in the way. I didn't look around to see what it went to. By the time I wiggle a wrench down on it there's hardly any room to move it, & I'm so contorted I can't really get enough torque on it to crack it loose