at the moment it is not allowed to add a device to a CA Device Family.
This option is only available for self created Device Families.
But there are more and more Cisco devices which support ssh capture or the Cisco CopyConfigMib for managing configurations and firmware,
but don't fit to CA's restricted search condition for the Cisco Device Families.
In such cases the CA Support advices to create a new Device Family and to develop your own scripts, even if the CA Device Family would work.
Not all Spectrum users are developers.
Please allow to add devices to CA developed Device Families.