Boards that are a bit less deep than a normal ATX board tend to have these 6 standoff setups.
If they are screwed in they can be removed, but they should not touch anything since your board is only 9 inches deep. VS the 9.6 needed to use those standoffs
I recommend care when making connections on that side of the board if it is unsupported. Preinstall the memory if you can because it hangs out way over that side of the board.
You may be able to get rubber stoppers to prevent the board from bending when installing memory or plugging things in(I use cut down white eraser when I ran out of actual rubber spacers for boards.), but you should still hold the board when removing parts.