both pics are of flipped hangars.....
(don't know how that happened--makes it a little confusing, unless you done it before)......
.if you swap left & right hanger sides, you actually have the room for more up/down spring travel (but you'll never use that much travel),
so like he said......the "hollow-u-shaped side of the shackle can face to the front of the truck or to the rear.....