If the export file contains dependent objects, the target connection and runtime environment fields show the connection and runtime environments from the export file as the default. You can accept the default or select a different connection or runtime environment.
If the export file doesn't include dependent objects and the connections or runtime environments that are used by the assets in the export file don't exist in the target organization, you must select a target connection or runtime environment.
If a suitable connection or runtime environment doesn't exist in the target organization, create it in the target organization before you import the file. For example, if you want to use a connection that uses a different end point in the target organization, create the connection that uses the end point in the target organization before you import the file. When you import the file, you can select the target connection that you created.
When you select a connection or runtime environment that exists in the target organization, the connector type and version must be the same as the connector type and version that the asset used in the source organization.
The following image shows the source connections and runtime environment and the selected target connections and runtime environment: