Amazon.com: 10pcs 2 Gauge 2 AWG x 3/8” Pure Copper Cable Lug Terminal Ring Connectors with Dual Wall Adhesive Lined Red + Black Heat Shrink Tubing – by WNI : Industrial & Scientific
2 Pin 16 Gauge Plug In M/F Connector
ASI 14 - 2 AWG Inline Splice Multi Tap Connector, Insulated, Black AICD2-1 - The Home Depot
2 Gauge Battery Terminal, Positive | Mill Supply, Inc.