KICKER brass hardware uses Versa-Gauge connection points with oversized convex screws for rock-solid connections. Use multiple gauge wires with no adapters needed. You get a clean, sharp install that lasts for years. BT4 Pos/Neg Battery Terminal. (2) 1/0-8AWG, (1) 4-8AWG The KICKER BT4 battery terminal works with 1/0 to 8 Gauge wire. This battery terminal uses Versa-Gauge connection points with oversized convex screws for rock-solid connections. The wire receptacles work perfectly for clean, sharp install and a negative-post adapter collar that locks into place.