cloudbase-init
add meta data service if missing
metadata_services=cloudbaseinit.metadata.services.configdrive.ConfigDriveService

add the plugins you need
for mine i have
plugins=cloudbaseinit.plugins.common.mtu.MTUPlugin,cloudbaseinit.plugins.common.sethostname.SetHostNamePlugin,cloudbaseinit.plugins.windows.extendvolumes.ExtendVolumesPlugin

you may also what set password and create user
cloudbaseinit.plugins.windows.createuser.CreateUserPlugin
cloudbaseinit.plugins.windows.setuserpassword.SetUserPasswordPlugin


cloudbase-init-unattend
edit meta data services
metadata_services=cloudbaseinit.metadata.services.configdrive.ConfigDriveService

nothing to do on the plugins here

Now system prep the image
cd C:\Program Files\Cloudbase Solutions\Cloudbase-Init\conf
C:\Windows\System32\sysprep\sysprep.exe /generalize /oobe /unattend:Unattend.xml