Abstract: Electrical connectors, generally such as are employed for the transmission of signals, and more particularly, a modified or customized BNC coaxial cable connector of the female receptacle type, which is adapted to enable the direct connection thereof with a single-signal or mono-signal socket connector in the absence of any interfacing adapter. The modified BNC coaxial cable connector has a central contact post in the configuration of a square cross-section in lieu of the normal BNC cable connector solder cup, and whereby a further in parallel spaced therewith contact post of similar square cross-section is added to the encompassing ground ring at a predetermined radial spacing to the central contact post, so as to enable insertion of the two square posts into the respective therewith operative associated socket contacts of the mono-signal socket connector.