Picked up rear drum replacements as mine were worn too far down, replacements look same except don't have the hub or lug bolts on it. Am I supposed to hammer the existing hub out of my old wheels and mount on the old one or did they give me the incorrect part? Autozone said this matched my car and the shoes I bought, which matched my old ones. Drums look correct, just don't have hub mounted in them. thanks!....Mark