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Commercial Electric 2/0 STR to #14 SOL/STR Split Bolt Wire Connector 20SBC-B1-5 - The Home Depot
IDEAL 10 Set-Screw Wire Connector (100 per Box) 30-210 - The Home Depot
Utilitech Up To 8 Circuits, 30a, 600v, #22-#10 Awg Quick Black in the Terminal Wire Connectors department at Lowes.com
3pcs 12 Way Barrier Screw Terminal Block Wire Connector Strip 3A 5A 10Amp For Electrical Wiring Household Use - AliExpress