How do I build the SUV?

Sorry all. This maybe a stupid question, but I can’t figure out how to build the SUV chassis.

I’ve researched every available Upgrade. Where do I select the chassis I want to build?

Thanks in advance…

Once you researched the body type, go to the 1st station in the line. Click on it and there is an option to select body types there.
You can even select how many of a certaintype you want before switching to another type etc.