Abstract: A connector for use in connecting two perforate members at a predetermined angle. The connector comprises a base plate. A first catch member on the base plate is able to engage in a perforation in one of the perforate members. A second catch member on the base plate is able to engage with a perforation in the second perforated member when the two members are placed together at the predetermined angle. A third catch member on the base plate is able to engage a perforation in each perforate member that is spaced from a perforation engaged by the first and second catch members. An offset is formed in the plate between either the first or the second catch member and the third catch member. The offset is about equal to the thickness of one perforate member.