Zero touch configuration question

As I have almost 50 devices (Pepwave MAX and Peplink Balance) to manage I am looking at centralizing everything within InControl. My firsts test are very promising, when I reset a device it’s reconfiguring itself automatically except 1 little piece. To have the DNS proxy resolving the internal domain we have to set the internal DNS servers as DNS resolvers for the PepVPN connection. I cannot find this specific setting within InControl and the Bulk Configurator seems to ignore the setting. Does anyone have a suggestion what I can do to get this fill this last missing piece.