My boat is different but the problem was similar. I opened a thread about it the 23/01/2022. Sorry I don't know how to add the link, but if you write "Rutgerson stopper" in the search box you'll find easily.
In my case it was a bad design problem and I had to remove the base plate. There were no other options and as most of the screws were "glued" to the aluminium base I had to brake the base plate, the screws and finally fix a different brand of clutches