I'm putting a headliner in my 68 GTX. There are several excellent threads and one step by step by resto rick that I've referred to but I still need some help in the sail panel area. Is the headliner supposed to be cut and the area covered by the by the sail panel boards. I bought a new set but I'm not sure how they attach. There appears to be mounting areas in the new boards for two clips of some sort. My new headliner has an extra loop/listing in the sail panel area. Should there be a short rod holding it on each side of the sail panel? Any help or pics from rear of the rearmost bow would be much appreciated! THANKS!