
You need an action that will actually map the customer variable to the request itself. To do this, create an action for "New Item" (you are not creating a new customer but a new link between the customer and the request). Then for the new object (NewObject2 most likely) select "Case Customer Link." For the Entity put in the new request (likely NewObject1) and for the $Customer put in the name of your variable from the form. That should do the trick.