There was no way to reach the nuts on the ski hook. I was able to access them by drilling two holes inside the "trunk" on the sr3. I used a regular hole saw with the drill running backwards while cutting the pilot and larger holes. I then went back and cleaned up the edges with an angled stone bit so spider cracking would not occur.
I have not decided yet on how I want to create a plate to cover the holes, but I really don't know how much it is needed.