Thanks Scarecrow for the photos, and I can see that the handle sits on the eye splice at the end of the Dyneema. And it appears that the dog-bone is tied on with cord which passes through the thimble, and then joins onto bungee cord. When one attaches the dog-bone to the harness, the cord pulls through the thimble until it is stopped at the thimble by the red knob.

Is this correct? I haven't seen this setup before. I would imagine that having the dog-bone up high like that would make hooking on easier?