Abstract: A plug connector for use in a computer system comprised of an upper shell side-hinged to a lower shell by a connecting portion. The upper shell has pins respectively inserted into pin holes on the lower shell, a pair of opposite eye end posts side-matched to a pair of opposite eye end posts on the lower shell respectively and retained together by respective screw bolts, a pair of opposite semi-circularly notched upright blocks end-matched to a pair of opposite semi-circularly notched upright blocks on the lower shell in providing two round holes respectively aligned with the eye end posts for inserting and supporting the screw bolts.