Answer
Yes, Simon Wiesenthal contributed to capturing the Nazi war criminal Adolf Eichmann. Although his role was limited and the bulk of the credit goes to the Mossad agents, Wiesenthal provided crucial information about Eichmann's habits, associates, and potential hideouts. He had been tracking Eichmann independently and offered this intelligence to the Israeli agency, which ultimately played a part in Eichmann's capture in Argentina in 1960.