You have to unlock the other locations by doing things in game. Here are a few I know:
You unlock 4 or 5 locations by doing the Gran Tour special event, and one for completing either all the Beginner AMG Driving School (Bronze Trophies) or just the full lap section, I forget which.
From looking through the Apex Car guide with the Collectors Edition, it shows a picture of a working windtunnel with Wind contouring to the body of the car. I'm hoping its in here, along with the Hanger you can see sometimes when you start up the game.