A connector is capable of fitting a plurality of mating connectors having various widths. The connector includes a housing including a plurality of fitting openings for receiving the mating connectors and a middle portion disposed between the fitting openings. The middle portion includes a sloped surface facing one of the fitting portions. The connector further includes an abutting portion disposed on the middle portion and protruding into the one of the fitting portions for abutting against one of the mating connectors when the one of the mating connectors is inserted into the one of the fitting portions.