If you are having trouble getting an initial gap to pry from, run the flat edge of the pry tool along the front-to-back plate seam until it slips into a gap. You can also flex the device slightly and work a tool into one of the lower corners, which have a lot of empty space behind them rather than fragile components.

Looking at the back face, another safe place to start is on the right side just below the page turn buttons. (Note the green arrow in the board photo, which is rotated 90 degrees counter-clockwise.) The tool goes between the lower button and the hinge cover slot. If there isn't a slot there, you're on the wrong side!