Hi Larry
I don't think we can assign business component in process integration scenario. Because business component does not present in SLD.
So if you want to use you file receiving system in integration scenario, then you need to create a technical system in SLD of type third party and then create a business system with that.
Use that business system as your file receiver.
Or you create a business component without party option and ignore the integration scenario part.
Create the ID objects directly and assign them to a configuration scenario.
In maximum projects we go for second option.