Yep, you might have a bar, but it isn't a draw bar when on a 3 point hitch.Your "real" drawbar is right behind that bar. Just chain to it with enough slack to allow you to lift, perhaps
like you should..... Using only 2 points and any makeshift braces only encourages damage to your trailer hitch and possibly the tractor when it gets away.But then you’d have to manually operate the trailer jack. If done properly using the 3 ph is fine.