Look carefully along the door where the old channel was. You may see holes near the bottom (towards the back of car) where a screw was set in there near the end of the strip, also a tab of metal may be on the side nearer toward the front of the door on the bottom of the strip section or a second screw. The top part is held in place by pressure of the curve in the slot. Sometime an adhesive is used but I did not use it. Use the window glass curve to get correct bend. Then place in door channel. You should be able to bend it with your hands or use a small thin block of wood cut to the shape of the window. It should be thin like the glass. Good luck.