Abstract: An electrical connector is provided for mating with a complementary connecting device having a mating portion. The connector includes a shell having an internal cavity and a front opening for receiving the mating portion of the complementary connecting device inserted into the cavity. A housing is mounted in at least a rear portion of the shell and has a mating portion extending forwardly into the cavity. A shutter is slidably mounted in the shell and is formed with a passage for receiving the forwardly extending mating portion of the housing therethrough. When the mating portion of the complementary connecting device is inserted into the cavity through the front opening in the shell, the shutter is slidably pushed rearwardly from a forward position to a rear position whereat the mating portion of the housing passes through the passage in the shutter for engaging the mating portion of the complementary connecting device.