You are correct. The 5/8" molding simple adheres to the retainer. It was easy to install, but wait for a warm dry day. I cleaned the retainer with alcohol, started at the lower front and worked my way back. I cut both ends about a 60 degree angle which will help to keep your cleaning pads and rags from getting snagged at the ends. The only thing you must watch and be careful is guiding it on to the retainer. If you let it get too low it will interfere with the window when you open the door. I simply used my finger as a guide, but be aware of that potential problem. It is also a lot easier to work with if you uncoil it when it first arrives and lay it out in a warm place to allow the tension to relieve itself from being coiled tightly during shipment.