Not the attach points
Mine attach to the toe rails also, but the lines from the blocks go thru a (again not sure of nomenclature) cam lock device. Maybe the cleats are there to tie the lines off instead of locking them, then you could adjust the running backs from the cockpit, releasing the leeward side and tightening the windward side.I wish my boat still looked like that, I've attached another pic taken a couple of weeks ago. I'm doing some major glass work, removing the bad spot on the port side, replacing a piece of deck, rebuilding portlights on both sides where there had been larger ports. If you want to know anything about what's under anything I've removed all the carpet and most of the cabinets.