John
The lady I am building this for wants a Petcool. The hook-ups are here behind this access door
and the ducting is thru the bottom of the forward cabinets and then up thru the wall cabinets to the vents. I fabricated an aluminum register box an attached it to the vent and 2" pvc. Of course that was after I puchased, modified, adapted and eventually tossed out a floor sweep head for a shop vac, trying to make it work for a register box.
Since only one pvc duct continues past the first tall cabinet, it allows for some storage under the hinged center panel with cup holders. The tall panel behind the center vent hides the LED lighting and reading lights