US Patent 7140908 Connector

A female housing (21) has a cavities (24) for receiving female terminal fittings (22). A front retainer (23) is mounted on the front of the housing (21). Insertion openings (29, 41) are formed on front walls (25, 40) of the cavities (24). An upper half of the front walls (25, 40) at a lower stage are divided into a front portion (40a) on the front retainer (23) and a rear portion (25a) on the female housing (21). Insertion openings (41) in the front portion (40a) of the front retainer (23) have guide surfaces (42) for guiding male terminal fittings (12) therein. Insertion opening (29) in the rear portion (25a) of the female housing (21) have auxiliary guide surfaces (31) for guiding the male terminal fittings (12) therein.