Answer
The CATIA connector installation is performed via the CERN CMF installation manager, through the icon as shown in the image below.
Once your computer is added in the NSC (to complete this process, the admin or the main user of the computer must accept a request sent via email), then, you will be able to install the CATIA connector via CMF.
Note that only Windows 10 physical machines managed by CMF are eligible for CATIA V5 installation.
