Connector with housing and retainer mounted to front of housing

A connector, comprising:

• a housing having a front end, a rear end and cavities extending between the front end and the rear end, a retainer accommodating space extending into the housing at a location between the front end and the rear end and communicating with the cavities, a recess extending into the front end of the housing and opening to at least one side of the housing, the front end of the housing further defining a plurality of loose movement preventing walls projecting forward from the recess in the front end of the housing;
• a retainer mounted to the housing for movement in a moving direction transverse to the cavities between a partial locking position and a full locking position, the retainer comprising a main body slidably disposed in the retainer accommodating space and a front wall slidably disposed externally of the housing and in the recess in the front end, the front wall of the retainer further having tab holes aligned with the cavities when the retainer is moved to the full locking position;
• and
• interengaging grooves and channels formed respectively on opposed surfaces of the front wall of the retainer and on at least one of the loose movement preventing walls at the front end of the housing, the interengaging grooves and channels being aligned parallel to the moving direction of the retainer for preventing loose movement of the retainer.