First off, your swing keel is down. It is a rusty Iron slab 6 feet long that is fat at the bottom and it weighs 300 pounds. Some of these have a dual cable system, one cable pulls it up and the other holds it down, but that is only the lightweight boards. The heavywieghts don''t need any help being held down. They only need help coming up.
But they can have a serious problem.
If they get anything wrapped around them, like a couple of crabpots, for example, and they are loaded with barnacles and oysters, you got a serious problem.
Get your boat hauled. You need to fix the cable anyway and inspect the bottom. Drop the keel and fix the whole problem. Inspect the keel pivot bolt under the saloon table and all the fiberglass around it. This area may well need repair after the muscling the towboat had to put on the boat to free it. you might have gotten the swing keel cocked forward in the grounding.
Write again when you get it out. I''m interested in what you find.