Hi Patrick,
My Bavaria 40 has two bolts in that location, with a pear anode attached.
BTW, what do you paint your Volvo folding prop with? I have the same prop, but just keep it smooth and polished. I do get some minor barnacle growth and I’ve been considering painting it.
I have a Stripper fitted too, which I have found very useful for lobster pots!
Alastair