Looks to be OK, I think the most you would have to worry about is if you were pulling sideways with a winch, but even then you would still be only adding a small amount of stress in addition to what is already there. My ARB has another bolt across the bottom going through the frame (perpendicular to the stock bolts) you could drill and add it as an extra support.
Don't forget to
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first then ask questions later! The loose nut behind the wheel