If you have not defined the data source for the remote database in the Database Connection tab of the remote database property sheet, PowerDesigner asks you to select the data source of the remote database.
Once the reverse engineering is performed, PowerDesigner displays the Merge Models window to show you the differences between the reverse engineered model and the current model. You can decide whether you want to accept or not the created or modified objects.
For more information about comparing and merging models, see Core Features Guide > The PowerDesigner Interface > Comparing and Merging Models.
The objects are added to your model. They are visible in the diagram and in the Browser. They are also listed in the Reverse tab of the Output window, located in the lower part of the main window.