A brake actuating system in a motor vehicle having wheels and brakes for braking rotation of the wheels includes a cable system including a plurality of cables operatively connected to the brakes of the vehicle. An actuator is operatively connected to the cable system and is operable by an occupant of the vehicle for movement between applied and released positions to selectively increase and decrease the tension in the cables of the cable system to thereby activate and deactivate the brakes of the vehicle, respectively. A cable tensioner including a rotary input member is selectively and adjustably coupled to an input side cable of the cable system. The input member is rotatable in tensioning and releasing directions. The input side cable includes a retaining structure that prevents disengagement of the input member from the input side cable when the input member is rotated in the releasing direction.