with the main door open:
the ticket printer assembly should pull straight out a few inches.
the player tracking face should rock up from monitor side to top and come off,
that should give access to the glass panel, lift up from the bottom and pull out gently past the retention tabs and lower it out of the way.
that should give you access to the innards of the top box.
reverse the order to put back together.
hope this helps ya.
ps: cant mess with the panda ears without getting into the top box to start with. dont hurt the poor panda, they like their ears