I don't have pictures of it in use. But the key is in the “Blake Hitch” http://www.animatedknots.com/blakes/http://www.youtube.com/watch?v=m2h3AtQnykY
A short rope (3 ft? in TAN on my pics) is knotted in the center to the trapeze dogbone connection, with each end tied in a Blake Hitch in opposite directions onto a second, long rope (15ft? BLACK on my pics) that runs from either end of the wing seat brackets, with a D-ring.
The entire TAN Blake Hitch system can slide along the BLACK rope when not under tension. However, as soon as tension is applied, the Blake Hitch grips the BLACK rope and locks you in place.
To properly set, once you are trapped out, you must pull the BLACK rope through each Blake Hitch such that the slack is pulled in between them, and produces tension in either direction. You still trap exactly the same way, but the dogbone is ends up locked in 3 directions - up to the mast, forward and backward.
It can be a pain to get in and out of, since the trapeze wires are in the middle of the boat, yet you need generally want to move your weight to the back, and this needs to be reset every time. And there are lines running that end up in the way at times you don't need them. But I assure you, it is easy once you figure it out (a little tricky solo) – but provides stability second to none.