Okay, this has been bugging me and Im hoping someone has a good answer. We are constantly seeing shots of Cap slide his shield onto his back with ease, I don't see a J-hook and I know he has that back buckle tying all the leather harness straps together. Is there a magnet or something locking into place? I don't see any hooks, are the straps somehow involved? Please answer my query because it is bugging me to no end.