10-Port Black Multi-Tap Pre-Insulated Connector, 3/0 – 6 AWG
https://nsiindustries.com/product/10-port-black-multi-tap-pre-insulated-connector-3-0-6-awg/
Polaris Black Multi-Tap Connectors form secure connections between multiple conductors with a rounded design and UV-resistant insulation coating. Installs with a hex key and torque wrench, with no need for cover and taping.