Sorry I forgot to reply to this one.
Are you asking about the ATS info display window by the FCP?
Someone with more knowledge can correct me if I'm wrong but from memory it will be on the very lower section of the main "pedestal" where the PFD/MFD light knobs are. It's a rotary knob called INTEG, just keep in mind there are 3 knobs if I'm not mistaken, each one responsible for a different section of the cockpit.
regards