a closure for a cable connector covered at the ends of the cables connected to each other in a sleeve through end face plates for closing both ends of the sleeve . grasping fittings are mounted at the ends of the cable contained in the sleeve which has axial restricting means and / or rotational restricting means provided in the sleeve for preventing the grasping fittings from moving axially and / or rotationally . thus , the closure can provide mechanical strength sufficient for enduring loads such as tension , compression and twist transmitted through the cables .