I have these, the hard bit is the cannon bone protector, so goes at the front, then the velcrow tabs fasten so they are pointing backward, then the tab with the logo on it folds down over the 3 tabs to secure them in place. The striking pad goes on the inside,
On the photo, the pic on the left - you are looking at the front of the nearside hind... pic on the right, you are looking at the offside hind from the back/inside.