A back connection is a type of outgoing connection where the user should always go back to the previous page he visited prior to the selected page when taking a certain action.
This is the same as if the user clicked on the browser Back button.
To enable a back connection, select Configure Connections from the page options menu and enable Always Go Back for the relevant connection in the Outgoing tab.
Enabling a back connection does not delete any existing outgoing connections, but hides them and overrides them. Disabling a back connection will reinstate any defined outgoing connections.