Even though you shined up the ends and your connectors, don't be fooled into thinking it'* as "good as new". It isn't. That corrosion wicks its way down the positive cable and eats it from within. Learn from my mistake and replace the cable now. There'* nothing quite as convincing as being stranded with a car that won't start because you didn't replace your corroded positive cable. I did the whole polishing thing with wire wheel on the connectors. It'* a false sense of security. I've been through this now with 5 Pontiacs: 74 Ventura, 78 Bonneville, 88 Grand Prix, 97 Bonneville, and 01 Grand Prix GT.
Dude, replace your cable. Trust me on this one.
97 SE, teflon wiper blades, Dunlop Sport A-2 tires, Leather steering wheel cover, Pioneer DEH-P480MP mp3 CDRW head unit, Pioneer 12-disc changer, iPod hookup, Boston Acoustic 3 way 6x9'*, Boston acoustic separates in door pods, Alpine 4 channel amp in trunk. Magnaflow dual outlet muffler and Ractive stainless tips. Autozone rice pipe and K&N 4750 intake kit. Clear corner lights. Energy Suspension end links.