Abstract: A module electrical connector including a box or housing having one side wall which is yieldable and which includes openings for receiving projections carried by female connectors which are insertable within the box. The box also includes an end wall having a notch for receiving opposed flanges extending from a female connector. The female connectors are interlocked by incorporating a series of notches in the upper and lower portions thereof with the upper notches being engaged by opposite flanges of an adjacent female connector and the lower notches being engagable by projections carried by an adjacent female connector.