For future reference, a lot of people take that metal/wire on the queen cage and twist it around a 2" nail. You don't pound the nail into anything. You lower the queen cage between two bars (then close the bars), turn the nail perpendicular to the bars and set it there. The queen cage hangs from the nail, between the bars, and can very easily be removed and inspected without trauma, when you need to verify that the queen is out.