To put on a cable protector, you should first clean the area where you plan to install it. Then, measure the length of the cable you want to protect and prepare the protector by cutting it to the appropriate size if needed. Position the protector over the cable and ensure that it is centered and lies flat on the floor. If the protector has adhesive backing, peel off the protective layer and press it firmly onto the floor. Finally, test the installation to make sure it is secure and that the cables are properly enclosed.