I guess I was confused by 705.12(D)
(1) Dedicated Overcurrent and Disconnect. Each source
interconnection shall be made at a dedicated circuit breaker
or fusible disconnecting means
You really have more experience with this than me. I have never seen one that didn't just connect to a breaker plugged into the bottom of the bus with a clip. For living in the "sunshine state" we really do not have that much solar PV.