I think that is one of the two front mounting bolts that fastens the crossmember that runs from front to rear and has the anti roll motor mount attached to it. You'd probably need to drop the crossmember (remove the motor mount bolt leaving the motor mount still attached to the cross member, remove the one remaining front mounting bolt and the rear mounting bolt) and then look and see what you are dealing with. It may be possible to weld it back in place if you can first remove the bolt. Never seen that happen before.
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