Re: gm side post into top post battery...
Cut the wires and put some longer wire to replace it. Or, trace them to where they run from....and just upgrade them with some larger wires... That is how I do most GM vehicles.
Vehicle: 2000 Toyota Tacoma Sr5 4wd ext cab with lot of raammat
Headunit: Pioneer Deh-8600mp
Speakers: 2x Phoenix Gold RSD65CS on Autotek ss amp
Sub: 2 RE SX 15's Walled, 2 RE SX 12's, 2 Pioneer Champion Pro 12's
Electrical: Red Top, Powermaster D2400, Big 3, 0 gauge, Stinger Sr200, 130 amp alt
Amp: 2 Hifonics 1000d < need more power