Abstract: An electrical connector assembly including a housing accommodating electrical terminals, a structure for locking each electrical terminal inside of the housing, a lid, a structure for maintaining the terminals in place including a locking body, and a structure for fixing the lid and the housing. The housing includes holes accommodating the electrical terminals and on which a structure for coupling the lid to the housing is included, so that there is a separation between the lid and the housing thereby allowing the wiring to pass to an outside through opposing ends of the lid. The locking body includes flanges that extend inside the housing, and mount the locking body inside the housing in a first position in which the locking body is partially outside of the housing. The flanges allow the locking body to be located at a second position where the locking body is placed completely inside the housing.