Molded electrical connection junction boxes and connection inserts for use in existing junction boxes eliminates wire-nuts. Wiring terminals, molded into the box, provide reversible electrical connections between conductor wires and other conductor wires or between conductor wires and wires from electrical devices. The box has least one opening through which at least one electrical conductor may be inserted. An open front face receives an electrical device, such as a plug receptacle or a switch plate. At least one wiring terminal block is integrally molded onto said connection box or onto an insert device. The wiring block comprises at least aperture for the insertion of the wires to be connected and one for receiving a wire securing means, such as a set screw. The box may be made of any moldable material, such as plastic or the like and the wiring terminal may be made of a conducting or non-conducting material.