It is possible the pads was glued on but most likely there are screw holes. The are under slits in the face or rear surface of the pad. A round smooth object such as a Phillips screwdriver can be used to apply pressure to the rear surface of the pad. As the pressure is moved the slits in which the screws are hidden will be revealed. Used a good screwdriver and lube the shank with a bit of bar soap or silicone grease to keep the slits in good sjape. When installing the replacement the same screwdriver can be inserted into the side of the pad that fits on the wood and pushed to the rear. This will show where the pad is to be cut with an exacto knife to allow access to the screw heads which will also be lubed before they are inserted thru the slits and out the holes in the base plate. Good luck with the project..
