...
- please start the CSC of version 4.6.x, this database where you would like import the configuartion configuration from the backup database and go to the point "Database" \"Import Database"
- go to right side in the CSC to "Add data source" and click the button "Add SQL-Server"
- please fill out all fields to connect the instance where your backup database (Testconfig) runs and check the connection. After a successful connection continue at "OK"
...