Saving the base object for a Top Secret synchronization project fails because the dialog does not show any jobservices.
For Mainframe connectors, the server functions (QBMServerTag) has to be manually created in ObjectBrowser or Designer manually which you can then assign to a jobservice.
However, there is a bug designated #25710 in the Top Secret connector in 7.0.1: The connector expects the UID of the QBMServerTag to match the SQL wildcard '___-Connector-Top Secret' with a blank inside. The object layer does not allow entering UIDs with a blank inside. Effectively, there is no way to create a QBMServerTag that works with the Top Secret connector.
Development has acknowledged and fixed bug #25710. We can provide a hotfix for 7.0.1 through a service request. Newer versions will contain the fix.