Question: What is the connection between Wombosi and Kane, i.e. how does Wombosi know/recognise Kane's corpse and make the connection to Bourne? Are we assuming that they had prior contact before Bourne tries to kill him on the boat?
Answer: In fact on the yacht Wombosi had fired 3 bullets at Bourne. He checks that the corpse has no impacts. That is how he understands that the corpse is not the one of the killer of the boat.
Answer: Wombosi is aware that the CIA is responsible for the attempt on his life. He is also aware that the CIA attempted to kill him because of his threats to go public with information about their activities in Africa. Conklin is unaware, however that Wombosi got a good look at Bourne's face. When Wombosi sees the body in the morgue is obviously not the man he saw on the boat, he correctly suspects the CIA is trying to fool him and will likely make another attempt on his life. Wombosi and Bourne had no prior contact before that night on the boat.
Question: How did getting shot knock Jason unconscious? Second, how did getting shot cause him to lose his memory?
Answer: If they had no prior contact, how would Wombosi have known the name Kane and to go check the morgue?