Originally Posted by tbuggle
well, both ends are symmetrical and it's SC. i've never noticed an icon and don't see why there would be one.
post a pic of your icons and where i should look, i'm not seeing it, nor am i seeing a reason why they might even exist.
I don't actually see the POINT of it either, but the 2 point mount on my 5800 ELS has the markings, too. I am pretty sure the mounts are symmetrical about the center of the turn table, the only reason I can imagine is that often times the throat of the frame is thinner than the tip of the frame, so the adjustable mounting posts (white) need to be adjusted less frequently if you've got one side always at one end (and don't have to look for it). Otherwise...
I should note that it'd be really nice if we could offset the mounting stocks, I like mounting my frames slightly lower (with the frame offset towards the handle side a little bit). I find that this is much easier on the Prince O3 frames.