the receiving slot defined in the rear portion of the housing 1 and the tail portions 42 of the contacts 4 protrude through the holes defined in the spacer 3 the spacer 3 seals the rear portion of the insulative housing 1 thereby efficiently preventing the melted plastic material of the cover 5 from entering into the housing 1 when the cover 5 is being molded the signal and grounding conductors 61 62 of the cable 6 are soldered to the tail portions 42 respectively the cover 5 is then over molded with the rear portion of the housing 1 and the front end of the cable 6 melted material of the cover 5 is received in the channel 151 the pair of ribs 17 is received in a receiving cavity 56 defined by four walls of the cover 5 and engaging with inner surfaces of the receiving cavity 56 therefore the cover 5 engages with the cable 6 and the housing 1 reliably the locking member 2 is then assembled to the housing 1 the transverse portion 20 of the securing portion 23 filly attached to the upper surface of the housing 1 the vertical portion 214 of the side portion 21 is received in the channel 151 the first and.