T7 California Ocean PHEV Questions and issues

I would like to order a 3d printed foldable tube to send heat to the upper bed in winter nights from the heater exit at the bottom. It is simple and cheap. But realized that heat exit is not at the pillar of sliding door like in previous models but below he fridge which is pretty unaccesible ( which by the way doesnt make too much sense to me... Cold and heat) in the Cali Ocean. Does anybody know any other exit? I couldnt find any other. In fact there is a ventilation grill on the pillar at the sliding door but i dont know the purpose. Any help from. an ocean user?
 
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