user doc: Added a cross-ref to the data mapper doc.
@@ -52,6 +52,7 @@ you added it.
.Next steps
Add a data mapper step before the OData connection. You must map
source fields that provide the data that is required to create a new entity,
-to update an entity, or to delete an entity.
+to update an entity, or to delete an entity. See
+link:{LinkFuseOnlineIntegrationGuide}#mapping-data_ug[Mapping integration data to fields for the next connection].
