a duplex electrical connector having a housing and an insert in the housing that provides two inbound end apertures that conduct two armored cables to and through a single outbound end aperture . the duplex electrical connector incorporates snap in spring steel retainers to provide a connector that allows rapid and simplified installation of a pair of armored cables into a single junction box outlet . the outbound end of the duplex connector preferably has a smooth outer cylindrical section and includes an outer diameter with flanges that accommodates a spring steel snap in adapter for retention of the duplex connector in a junction box . the two inbound apertures each include a spring steel retainer having outwardly extending tangs that hold it in the inbound aperture and inwardly extending tangs that retain an inserted cable and resist retraction thereof from the duplex connector . the inwardly extending tangs are oriented to guide an inserted armored cable toward the single outbound end of the duplex connector .