Mounting Rope Clutch on deck

Oct 31, 2022
75
Catalina Capri 22 Huntington
I have a Capri 22 without the race package. I want to mount a Rope Clutch on the starboard side for the main halyard (in the same location as the factory race package has it). I read somewhere that there is an aluminum plate under the deck to drill and tap threads into for mounting. Is this true? Or will it be through bolted all the way through? @Crazy Dave Condon do you know?