Those rubber cover strips seem to be missing quite often. I went looking in the parking lot to find a truck that had them to take a photo. I did, but it doesn't do me much good. I've combed through these threads, the shop manual, and looked at the part, and I still can't figure out the orientation to pop that L-shaped trim into the channel. L shape towards the glass or towards the front of the truck? L leg in back (hidden) or towards the middle of the truck (visible)?