Since I’ve restored my truck I am constantly adding and upgrading. New stereo with amps and subs, air horns, 7 KC roll bar lights, 17 Infinite under carriage rock lights, Holley EFI Sniper and CB radio. Who know what’s next. I finally decided to add an additional battery. I took out the red top Optima and replaced it with two yellow top batteries. Yellow top is better for audio upgrades. 4 gauge wiring Wrapped with Painless wire wrap. Purchased a matching billet battery tray for 2nd battery and grounded to frame. All work was done by me. Everything custom cut, crimped, heat shrink and installed.