The facetious answer is, of course, behind you…
I bought a pair of 1030As to add as rear speakers last year. They were mounted on desktop stands on a desk behind the organ so they ended up roughly at head height. However, they weren’t great, maybe the choice of speaker was wrong. I swapped them out for an old pair of floor standing Mission speakers wired up to a NAD amp. These aren’t at head height but do a much better job so I’m not sure how important the position is relative to your ears. For me, it was more about being able to hear the speakers at a decent level given the distance from the listening point versus the front facing monitors. I’ve now moved the 1030As to join a pair of 2031As in a single group facing me (along with the Mission speakers behind me) and I’m very happy with the sound. Just a subwoofer to add now…