Move orgs/locs into DA unit

Question regarding Delegated Admin Units:

Is there a way to "move" organizations/locations from the main/root instance to a DA Unit? Via Custom Object, UI, ...?

Reason is that a org/loc created by the root instance cannot be changed by a DA unit user - which is as expected, but how to grant the DA users to manage their orgs/locs themselves? Anybody found a solution for this?

Thx, Klaus