Abstract: A method and system for providing improved wall structures within a security cage includes one or more unique couplings that are provided at the intersection where two wall panels may join together. Each wall panel of the security cage may have two edges where each edge is designed to mate with another edge of a respective adjacent wall panel. Each edge may have a geometry that is one of two types: an open facing geometry and a closed facing geometry. Each open facing geometry edge is designed to mate with a closed facing geometry edge. This means that usually a first wall panel having an open facing geometry edge will mate with a second wall panel having a closed facing geometry edge and vice-versa. Each open facing geometry wall edge may have a first unique geometry and each closed facing geometry wall edge may have a second unique geometry.