From the submitter:
"Well, I have car music again. It doesn't sound great, and I have to manually apply +5VDC to turn on the amp, then disconnect another cable to turn it back off... but it works for now."
"Need a lift, buddy?"
"Yeah, in more ways than one!"
Two bottle jacks, two scissor jacks, a Twilight book and 2x4" oughta do it! Left in a municipal lot, on a slope.
I'm jacked up on knowledge, brah!
futon frame bent in the middle so instead of fixing it, he utilized the handy AC Delco floor jack!
The four pieces of tape were all necessary too.