You cannot really even see the bottom in this photograph but it is clearly visible in step seven please before trying to remove this panel look at step seven to see the button I have described lol

This tip and photo made me break this panel lmao there's a button top right of the disk tray you're supposed to push that not a "tab on the right side of the device" the mechanism to unlock the panel safely is in the top right of the inside of the disk tray