A cable connector assembly includes a connector, a printed circuit board having a rear portion, a cable connected to the rear portion, a strain relief having a main portion, a shell having a front wall and a rear wall, an outer case enclosing the shell and having a front end face and a rear end face, wherein the main portion is disposed between the rear wall and the rear end face, and the main portion comprises at least one through hole. A method of assembling a cable connector assembly, the cable connector assembly including a connector, a printed circuit board, and a cable, the method comprising the steps of: over-molding a strain relief with the cable to have a main portion defining at least one through hole; disposing the printed circuit board in a shell; and mounting an outer case forwardly over the shell to press the strain relief.