Hackers Help: Can any one tell me if VIKEDAL Mirror glass door is glued down to wooden door?

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Hi, I’m looking in to purchasing 4 VIKEDAL Mirror Glass Doors — then, removing the mirrors from the front of the doors that appear to be held into place top on bottom with screws and 2 grey angle bracket trims. I need to cut the doors on angle to fit under a stair case and then I intend to cut the mirrors with a glass cutter then reattach them back on doors which will also be cut on angle. My question is does anyone know if the mirrors are simply held in place with the top and bottom brackets or are they also glued down to the wooden door as this would cause issues in what I had in mind. Any help or advice would be appreciated.