Fender trim

My question about my particular car and the installation of the rear trim pieces. My front fenders have a lip approximately half an inch wide so they are not a problem. My rear fenders have no lip at all on the arch of the fender where the trim should be mounted, (The section of the rear fenders below the arch of the wheel well do have a lip however). Can you tell me if these trim pieces have something like a small extension or something that will allow them to be mounted to the lower half of the fender with screws or maybe a double back tape of some kind on them? I just do not know how they can be mounted on my car even though various pictures show them on one just like it. Lol.