A method and apparatus for controlling the routing of operating cables from a computer or terminal. The apparatus includes a terminal and a cable block. The terminal has a mounting wall and a receiver for detachably securing the cable block thereto. The cable block has a U-shaped housing having an open side which faces the mounting wall and it also has internal dividers to provide open compartments to receive the cables. The U-shaped housing has resilient tangs thereon which cooperate with corresponding tangs on the terminal to detachably secure the cable block to the housing with the cables being routed between the compartments and the mounting wall.