I'm going to advise against it, not because it doesn't fit, but because myself and another user both experienced some discoloration after having the monitors vertical for a while. It may have been due to the marquee light, or crappy shielding, I don't really know since I'm not a tech guy.
But if you are anyway, I don't think you can lay the bottom of the monitor in and then lean the top backwards into place. Instead you might need to place the whole tube in at an angle so the top of the frame sneaks past some of the mounts. I can't quite picture it from memory.
Hopefully that helps a little.