Data Base are files related to a Theater and not to a specific campaign. They contain the Units and Objectives technical details.
Some modification would eventually needed to be done in some of these files.
Most can be accessed through Falcon BMS Editor.
Some can be simply accessed with any Text editor.
SA-2, SA-3, SA-5 battalions are set to Static Move Type in BMS Database, so that makes them as always spotted and visible in UI/2D and for Recon.
To make then invisible unless spotted as any over units :
Change “Move Type” from Static to Foot or Wheeled
in Falcon BMS Editor / Units / Battalions / Units / “Move Type”
Ex : SA-2(S-75) Index 161 in KTO