A cable assembly (1000) includes an insulative housing (11); at least one contact module (13) mounted to the insulative housing, the contact module including a plurality of contacts combined with an insulator thereof, said contacts (1312) having mating portions (1315) disposed in front of the insulator and tail portions (1316) disposed behind the insulator; a cable (14) having an insulative jacket (141) and a plurality of wires (142) enclosed by the insulative jacket; and wherein the tail portions of the contacts are respectively penetrated into the wires along an axially direction.