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Looking at that I can say that it definitely doesnt look strong enough for any form of recovery. I am thinking after seeing that, it could either be a spot for a factory bull bar (not nudge bar). Or possibly for spotlights. When you drop the bumper whats on the other side?
Our Adventra has a thread in there for a piss weak recovery hook.
Maybe Holden got lazy and stopped threading them?
Then why not just ring holden and ask?