Thanks for the response, Scott. Wall isn't thick enough for a vent stack, think that' over on the outside wall. Appreciate the thought.
Odds are you won't find anything in the outside walls as they too aren't thick enough and would impede the production process. Usually the vents are just inside the outside wall between two walls or corner that is block off.
What are you wanting to do on the wall? Odds are both sides are covered with thin material not suitable for screwing and supporting anything. You will find that anything Lance hangs on the walls are glued in place with screws used just to hold it until the glue sets.