Reel glass is easy
There are 3 or 4 nuts that secure the player display panel to the door
disconnect the 2 connectors from the display then remove the 3 or 4 nuts.
Lift the display from the door, it may be stuck to the reel glass so be careful.
You also have to loosen the reel light bracket a little
Be prepared or you may drop the glass.
Belly Glass
unlock the belly door if you have a lock installed
place hand at top of belly door and pull out on the knurled knob in front of your main door latch
lower belly door down until the cables have the weight
I would unplug the light ballast from the 120V then disconnect the wiring going to the ballast from the light itself.
There are 2 nuts on either end of that secure the light bracket to the belly door
once you have the light bracket loose from the belly door the glass just lifts out
it is easier if you gently push up on one end then grab it and lift it out carefully.