I used to own that model. If I recall, the heater vent on our unit was under the cabinet opposite the bathroom. It actually pointed towards the bath. Didn't get much heat to the bunk room. I removed the false panel to access the duct and relocated it to point into the bunk room. I bought a new round vent to attach to the duct and left the original in place so I didn't have to repair the hole. BTW, ours had a curtain instead of sliding door.
The master bedroom had the duct in front of the bed between the bed and entertainment center (I think)
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