Hello,
In our organization, we fill in the attribute "location" in the SAMBA-AD attribute of a computer.
Then in the Veyon Configurator, in the LDAP Basic/Advanced parameters page, for the identification of the location of a computer I choose "Location Attribute in computer objects" (or something similar as mine is set in french language)
Also, in the LDAP Basic environnement paramaters page, for the field "Computer Location Attribute", I fill in "location". (not sure this last one is mandatory - I can' recall exactly as it is some time I have worked on these settings).
All the settings are set at the installation of Veyon with a json file preconfigured passed as an option to the Veyon installer , so everything is set automatically provided the AD has been fulfilled.