Gardner Bender WingGard Large Blue 14 AWG to 6 AWG Wire Connector (50-Pack) - Baller Hardware
NSI IPLG6-3 3 Wire Insulated Connector for 6-14 AWG Fine-Stranded Flexible Copper Conductor, Polaris Gre, Pack of 12: Wire Terminals: Amazon.com: Tools & Home Improvement
Gardner Bender WingGard Large Blue 14 AWG to 6 AWG Wire Connector (50-Pack) - Taylor's Do it Center
Polaris 3/0-6 AWG Insulated Tap Connector, Black IT-3/0B - The Home Depot
Polaris 600 MCM - 6 AWG Bagged Insulated In-Line Splice, Black ISR-600B - The Home Depot
ASI 6 AWG - 250 MCM 600-Volt 4-Ports Multi Tap Connector, Insulated Single Sided Entry, Black AICS250-4 - The Home Depot
Polaris 3/0 - 6 AWG Bagged Insulated Multi-Tap Connector, Black IPL3/0-3B - The Home Depot
Ideal 30-454 Blue Wing-Nut® (454), #14 to #6 AWG / 600v (25/Box) | NorthEast Electrical
ASI 6 AWG - 250 MCM 600-Volt 3-Ports Multi Tap Connector Insulated Dual Sided, Black AICD250-3 - The Home Depot
Amazon.com: 10pcs 6 Gauge 6 AWG x 5/16” Pure Copper Cable Lug Terminal Ring Connectors with Dual Wall Adhesive Lined Red + Black Heat Shrink Tubing – by WNI : Industrial & Scientific