[Ernst]

Correct me if I'm wrong, but it looks like there are two giant pneumatic cylinders (one on each side) with hooks on them, that I'm guessing alternate to climb up the corner. They seem to pivot, pushed up and down by smaller cylinders. It looks like there's another pneumatic cylinder at the top that serves as a clamp, which I'm guessing is to clamp onto the corners where the horizontal bars meet. There's probably some alignment guide on the front that we can't see. Additionally, there seems to be a belay device attached, just so it doesn't fall.