A cable connector assembly includes an electrical connector and a cable electrically connected with the electrical connector. The electrical connector defines a plug portion, a printed circuit board electrically connected to the plug portion, a pair of LED lamps mounted on the printed circuit board, an optical element transmitting the light emitted by the LED lamps and an insulative housing covering the printed circuit board. The optical element defines a pair of transition portions transmitting the light emitted by the LED lamps and a photic zone, the photic zone of the optical element is exposed to the insulative shell and has a closed circumference so that the light emitted by the LED lamps passes through the photic zone to form a continuous aperture.