Electrical connector and manufacturing method of electrical connector

An electrical connector, comprising:

• a housing comprising a receiving groove which is toward the rear, a through groove which is communicated with the receiving groove and is opened forwardly, two fixing protrusions which are positioned on two sides of the receiving groove, two first mounting holes which are respectively positioned on the two fixing protrusions and are penetratingly formed up and down, and two second mounting holes which are positioned on a top of the housing and respectively correspond to the two first mounting holes;
• a circuit board comprising a mating portion which is positioned to a front portion of the circuit board, a cable connecting portion which is positioned to a rear portion of the circuit board, and two third mounting holes which respectively correspond to the two first mounting holes;
• a cable electrically connected to the cable connecting portion of the circuit board;
• a back cover which is molded on an outer periphery of a connection between the circuit board and the cable and mounted into the receiving groove, so that the circuit board protrudes forwardly from the through groove, the back cover comprising two first fixing portions and two fourth mounting holes which are positioned in the two first fixing portions and respectively correspond to the two first mounting holes;
• and
• two fixing posts extending up and down and passing through the two first mounting holes, the two second mounting holes, the two third mounting holes and the two fourth mounting holes.