He had to show his passport at the first counter, then DS-160 confirmation at the other counter. They asked for his interview appointment email confirmation and a photocopy of his passport and said this was required. This was not shown in the required documents in the packet so make sure you bring them!!
She asked for pictures but just saw 2 of them.
She then said everything is good so congratulations, you are approved! She told him that he will get a text once his passport is ready for pickup.