Proximity to home: justify the transfer as a reintegration ground under section 10 StVG with family evidence.
Proximity to home is the most common and most plausible ground for transfer. A transfer closer to the family home supports keeping up outside contact and thereby reintegration. Section 10 StVG permits a change of the place of imprisonment where it promotes reintegration and no grounds of expediency or security stand against it. The more concretely the family burden is documented, the more the application carries.
What to do now: First, document the family situation: proof of the family residence, school confirmations for the children, an account of how often visits have been possible so far and which obstacles exist. Second, obtain statements from relatives, ideally submitted through the lawyer correspondence so that they are on the file. Third, work out the link to reintegration and to later conditional release under section 46 StGB, because stable family contact supports the social forecast.