And a good opinion it is.  I agree that those cable ends are not ideal.  At least thoroughly solder the end of the big wire, and solder the small wire to it, then clean ans silicone seal all exposed wire.  Then  clean and re-clamp the end.  All those strands are just an invitation to corrosion.

Larry

That red wire is the same one that I had problems with. One day my gas gauge stopped working, and my battery kept dieing. I found out the connector on the red wire that bolts to that black terminal block had come undone. Crimped new end on and solved problem. Battery was now being recharged and fuel gauge works fine.

"I have a hot battery post" Sounds like a great "Pick-up-line" Dave

Agreed with the others about the "temporary" battery ends,  they are good in a pinch, but in the long run they don't hold up,  somewhere out there is a self installing battery end that is a collet design, the battery cable goes through a threaded ring and that ring threads into the clamp, as it is tightened up it "squeezes" the cable kinda like a drill chuck on a bit those work "pretty good" compared to the clamp type according to my boss(i work for Interstate Batteries distributor, so, i've seen my share of batteries... couple lifetimes over) who has been in the battery business since 1972, has never liked the temp ends, as they do create problems like this, and corrosion,bad connectivity, etc... but as Larry and Phillip mentioned, a new set of cables would probably be the way to go :)  and should you go that route, i may suggest getting the largest gauge possible :) (welding cable anyone?? :)

Thanks guys.

Bubba done it...GM certainly did NOT!