A front wall (50) is movable between a full locking position and a partial locking position on the front of a female housing (10). When the front wall (50) is at the full locking position, mating tabs (70) can enter main portions (41) of the female terminal fittings (40) through tab insertion holes (51) of the front wall (50) for contacting resilient contacts (45) and an unlocking jig can be inserted into a mold-removal hole (14) of the female housing (10) through a jig insertion hole (52) of the front wall (50) to disengage a lock (12). When the front wall (50) is at the partial locking position, detection probes (60) can be inserted into the jig insertion holes (52) of the front wall (50) for contacting detecting plates (46) offset from resilient contacts (45) in main portions of the female terminal fittings (40).