A cable assembly (100) is mounted into a panel (200) defining a mounting hole (501) and has a first connector (1), a second connector (2) back to back assembled to the first connector, and a cable device (3) mounted to the first connector. The first connector (1) has a first insulative housing (10) having a base (101) and at least a locking member (102) extending through the mounting hole to lock the first connector to the panel. The base and the locking member are integrally formed as a whole.