No its not a dump question. Theres many way to use a quiver. This one is made for to use on the right side. Its hang on a belt like this "Image".
Or if i use armour its hang on a "battle belt" on my right (i dont know, maybe there is a proper name on english :D)
Theres many technics. You can us on sides (left right), back side, you can use on your back on your horse, so i think everyvhere where you can hang on. :D