I'm not sure this is the right forum for this but--How do you hang a bracket from a lamp post for an address plaque? We have an iron pole that has two screw holes about 6 in. apart where the PO had one. The pole is hollow, right? So how would I put screws in? Is there any kind of black clamp that you can attach a bracket to the pole that won't look too bad? This shouldn't be so hard.