Yeah! It's exactly like an older version of one of those. It's mounts right in the center of the boat about a foot and a half from the back. there is a block on the back of the boat directly behind it a foot and a half, and blocks on either back corner.
If you look here
---whoops would not let me post a link-----------
it's like 326. And see how 326 has the metal loop right there, the tension from the sail pulls on the sheet, which in turn pulls on the swivel mount, which turns around and faces the back, which twists the sheet on the metal loop at the back of the cam
cleat, locking it in place, so you have to use both hands to feed it through.
On my swivel mount, instead of a spring, there is a little piece of metal sticking up with a small hole in it. I can't figure out how this would hold a block, or if mopunting a block there would do anything in the first place.