Afcad beginner...

Silly question... If one should download an AFCAD file in a scenery-package, where should this afcad-file go... Just under the add-on scenery-folder or is there a specific place?
Thanks,
Omag
Thanks,
Omag
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So the afcad-files should be treated as an add-on scenery file
It has to be activated?
However, the airport now shows the default ground-textures ( fields etc.) where it didn't before