A cable guide or cleat for a cable, comprises, in one embodiment, a pivot mounting, a base section on the mounting and an upper section that, when fastened to the base section, a cylindrical guide with clearance for a cable to be passed through the guide for installation, and an insert piece designed to be inserted when the cable is in its final position, so that the base and upper sections, clamp the cable in place. The clearance allows the cable guide to be used first without the insert, when laying the cable, facilitating the laying of the cable round bends in particular. Then, when the cable is in place, the cleat is released again and the insert put in place, so that when the cleat is fastened the cable is securely clamped. Disclosed systems obviate the need for separate temporary guides that would otherwise need storing.