Anyone add the third air conditioner to Fuzion 420?

[twvette]

Curious if it is likely "pre-wired" for the third AC? I have one in the front bedroom and the other is in the garage. I have two very basic thermostats for these so not sure how would "control" the three also as assume get to only use two at once. I see the location for the third was above the bunk bed where currently have a roof vent. Seems like a bit strange location so not sure how effective it is, especially since also don't know if might be some plugged ducting to tap into also to help get it from the bunk area out into the actual living area or if will just have to be a direct dump of air only?