An electrical connector includes a pair of terminal modules sandwiching a metallic shielding plate via an insert-molding process and sandwiched between a pair of metallic shells to be commonly enclosed within an insulative front/inner housing via a first stage over-molding process and an insulative rear/outer housing via a second stage over-molding process. The rear housing forms a base from which the mating tongue of the front housing forwardly extends. A plurality of first positioning holes extend through the shielding plate, the pair of insulators, the pair of metallic shells. A plurality of second positioning holes extend through the front housing and the rear housing. The first positioning holes are filled with either glue or material of the rear housing, depending upon positional relation with the corresponding second positioning holes.