Polaris IPLMD350-6 350 Mcm – 6 Awg Polaris Insulated Multi-Tap Conn 6 Port (Dual Sided Entry & Mountable)
https://nsiindustries.com/product/6-port-black-mountable-pre-insulated-connector-350-mcm-10-awg/
Polaris Black Multi-Tap Mountable 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.