Hi bipbaep. Is the request to be able to set the cnMaestro URL and other connection details in the device via cnMaestro? If so, this can be done using AP Groups in the User-Defined Overrides section. This section allows you to enter configuration parameters that are not included in the AP Group by default, which includes the cnMaestro connection settings.
See this Knowledge Base article for instructions for adding configuration to this section.