A cable connector includes an insulating housing having a plurality of cavities, a plurality of contacts received in corresponding cavities of the housing, and a plurality of cables terminated to the corresponding contacts. Each contact defines an intermediate portion, a pair of side contact beams extending from two opposite sides of the intermediate portion and a tail portion extending from an opposite end of the intermediate portion. The tail portion defines a second pair of gripping wings, each gripping wing defines a first locking portion and a second locking portion connecting with the first locking portion, the first locking portion and the second locking portion have a different height.