This is a PCT-104 push wiring connector for junction box 4 pin conductor terminal block wire connector.
These 4 hole wire connectors allow you to easily splice on connections to electrical cables. These connectors can splice a single wire up to 1 more wire. Combine any combination of solid, flexible and flexible copper wires faster and more reliably. It connects lights, parasol curtains, awnings, doors and gate controls, Interphone, pumps, speakers, etc.