You could try changing the location of the Satellite System database and make it primary at Satellite location.
So the Satellite Administrator can add the TTF required.
This comes from the Global Manual:
A System Administrator at any location can administer the System database for a Satellite location, provided that the Satellite’s System database is primary at the administering location. The administering location can be the Hub or a Satellite location. If necessary, change the location of a System database to make it primary at the administering location: