Comparing your pictures to our set up, the metal "box" the TV sits in is completely different. Not sure how they could put a different mount in there. The second picture shows the sink drain plumbing taken from the underside of the TV. Forth picture is from inside the sink cabinet. LOTS of daylight and heat coming in through the TV box when the cover is open.
EDIT: Sorry the last two pictures are rotated. Haven't figured out how to prevent that.
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