To put units in the room inside the superstructure (The room you walk in during the first mission of the "Harvest Red" Campaign.) you put the same thing as you would putting somthing on the Deck.

this setPosASL [getposASL this select 0, getposASL this select 1, 15.9];

For the larger room Bellow the deck you put this

this setPosASL [getposASL this select 0, getposASL this select 1, 9.19];

I was trying to figure it out, came across this topic and used the ASL thing. Hope this helps any future viewers also.