It's a picture of a guy who could have been anybody.
There is nothing to connect Cruz Sr. to Oswald.
The funniest part is that Oswald was the only member of the pro-Castro group he was handing out flyers for. He couldn’t get a single other person to join him.
Whoever those guys were who helped him hand out the flyers, it seems likely that they were only there because Oswald paid them to do it.