Fourth from the left.
Retronaut and other sources (including Connery’s own website) claim he finished third in the Mr. Universe competition in 1953. But when you look at the group photo, that seems unlikely: He’s not big enough.
His Wikipedia pages also refutes the claim, saying he either finished third in the Junior class, or failed to place in the Tall Man classification (he’s 6 feet 2 inches).
Still, he looked impressive oiled up.