Sega TETRIS GIANT Owner's Manual page 68

5
Refer to Steps 3 and 4 to remove the button on the opposite side in the same way.
6
Remove the 8 tamperproof screws and take off the lower instruction plate (transparent plate).
TAMPERPROOF SCREW (8), chrome
M4 x 16
LOWER INSTRUCTION PLATE
(TRANSPARENT PLATE)
ASSEMBLY AND INSTALLATION
59
6