An electrical connector includes an insulative housing enclosing a plurality of terminals and enclosed within a metallic shell. The shell forms a receiving cavity in which said housing is retained. The shell includes opposite top and bottom plates with a plurality of spring tangs split therefrom and extending into the receiving cavity. A top extension unitarily extends rearwardly from a front edge of the top plate and includes a front stationary base section intimately positioned upon the top plate, and a rear deflectable section including a plurality of spring fingers rearwardly extending from a rear end of the front base section in an oblique manner away from the top plate. The front base section forms a plurality of openings corresponding to free ends of the spring tangs for accommodating the corresponding free ends, respectively.