Pity. I've been trying to figure out a few of the parts, but not something I usually work with.
So I guess that's a cable winch. I'm online searching for winch part names.
Attachment 516208
And, the black piece in the middle that looks like two pulley wheels that the wire goes through and then is attached to both sides of the wood to tighten it. And the red piece that the load hook grabs on to that also seems to be a pulley. I think that's a "Snatch Block".
That system looks great. I'd love to know the name of those parts so I could order them. It really looks to be the best setup I've seen:
Attachment 516207