How do I open my MX Revolution Mouse (without screws under mouse pads)

My MX revolution DOESN’T HAVE SCREWS under the mouse pads. Can’t read the PID but the P/N appears to be 831869-0000 but can only be sure about the 1st 4 characters.

Dongle is original USB (not universal and no connect button). P/N of 831735-1000 and PID of LZ64784 for the dongle.

ANYBODY KNOW HOW TO OPEN IT