Hmm? Are those original wall mounts? I didn't know they even existed.
In my application, I need to mount them at an angle (both vertical and horizontal) relative to the wall(s), so mounts like that are pretty much out of the question, but if they're really OEM, they're an interesing bit of trivia nonetheless. I just wonder how they're attached, as there are no screws on the backside of the speakers - with the exception of plastic "screws" to tighten the straps/bands, of course.