As per my previous post most tonneau covers that have not been used for many years will have shrunk. I needed to find an extra inch to make the cover fit well so after a trip to a local marina to get the “lift the dot” stud and socket. I made the adapter shown in the pictures by mounting the clips to a piece of plastic. Polypropelene plastic the type that oil containers are made from is best.
Works well the the tonneau cover is now useable again.