Clear 4-Wire Push-In Wire Connector, Solid or Stranded, 75 Carton
https://nsiindustries.com/product/clear-4-wire-push-in-wire-connector-solid-or-stranded-75-carton/
Easy-Twist wire connectors are the professional choice for forming quick, secure connections between wires in the field. The push-in connector design forms strong connections quickly using a two-blade construction.