I'm pretty sure they're still in their original box, but I can't recall which portion they came with. I tried scouring the flip-book guide about parts, and found that they call them L-shaped somethings in the illustrated parts section, but couldn't find any reference to them in the descriptions how what to do with fixtures.
Also, to clarify, the 'snow plow' graphics that go up in the more non-cosmetics areas (shampoo, hair, etc) and hang over the top of the long gray category graphics.. did your store interpret the advice to not put them on the back wall, as, "don't hang them from the back of the wall, as in, behind the metal fixture, but rather on the metal fixture" or "do not put these graphics on any sections along the backwall, regardless of the fixture off which it hangs" ? It seemed to me that it was saying not to hang the graphics off the back-of-the-wall, instead of "don't put any on aisles along the backwall entirely" but an ETL thought it meant the latter. The little illustration seem to emphasize hanging them off the metal overhang fixture, rather than being placed on the actual back of the wall..