I think you can do that by creating a relationship between your recloser feature class and your CircuitSource table: ArcFM Desktop Configuration Guide
Whatever point feature class has a circuit source record assigned to it becomes the source of the circuit.
Here are the full steps to configuring Feeder Manager 1.0, which might help: ArcFM Desktop Configuration Guide
Hi Tim and David-
The steps David outlined above do work and will export out the Recloser as the feeder source inside Windmil.
Tim, I think you also wanted the EquipmentID field from the Dynamic Protective Device Unit to be exported out along with the circuit source information? Is this true? I have not had success to get the Recloser to export out as a feeder and to carry the EquipmentID attribute to match the eqdb value.