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.
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.