Well, you need to create a reference to the VI that you want to show. Then you will need to invoke the Insert Subpanel Method to insert either the FP or BD into the subpanel.
Have you tried reading the LabVIEW Help file on Subpanel Containers? Surprisingly, it does "Help."
Do not be shy using the example finder!!!!!
Then post back your own solution!
"Should be" isn't "Is" -Jay
