As noted, hooks on the bucket are really just for lifting and, once in a blue moon, lighter pulling. Centered over the lift arms on the bucket is the best idea and bolted or welding to a piece of plate steel that is welding to the bucket makes it stronger. That plate in the shape of a "fishplate" makes it stronger for higher HP applications. Search my screen name for pictures or details on my Deere 5520 for more.
I hook a chain between my two hooks, keeping it pretty tight, and hook a short chain in the center of it to lift with. That way the load is borne by the two hooks and is better supported. One hook in the middle is nice for light things but my two hooks and chain does the same thing and I don't have to worry about bending the bucket at it's weakest point. We've all seen bent buckets and they are not easy to un-bend.