The brass bar in the middle front under the unit may not be the best spot for it, it might have dented the bottom. He might have had an extra brass and didn't know where to put it, so he set it down in the center of the power transformer, forgot about it, then took the picture.
But the one on top of the transformer has a different look from the rest of the brass feet, it has a flange of some sort toward the bottom of the brass. If it's the case, I hope he remembers to take it out before he put the cover back on and ships it to the next lucky winner. Or I hope the next lucky winner will check this thread before he plugs it in.
