Amazon.com: 25pcs 2/0 Gauge 2/0 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
Ilsco PBTS-2-1/0 Nimbus Insulated Aluminum Multi-Tap Connector, Conductor Range 1/0-14, 2 Ports, Single Sided Entry, Tin Plated, UL, CSA | Quality Electrical Distribution (QED)
JacobsParts 2/0 AWG Insulated Ring Terminal 00 Gauge, 5/16" US Custom Stud Size, Red and Black Boots for Car Audio Amp/High Current Power Cable/Ground Wire: Amazon.com: Industrial & Scientific
Burndy BIT2/0 Unitap Clear Insulated Multiple Tap Connector, 14-2/0 AWG/kcmil Wire Range, 1.4" Width, 1.52" Length, 1.38" Height: Power Distribution Blocks: Amazon.com: Industrial & Scientific
Wire Terminal 1/0 - 6 AWG Tinned Copper Terminals
1PCS Insulated Inline Splice Connector 2/0-6 AWG Aluminum to Copper Wire Connectors Slotted Allen Hex Insulated Cable Connectors - AliExpress