ASSEMBLY INSTRUCTION ITEM : 902864 ALLEN WRENCH 1PC STEP 1 You will need one people for this installation. And will take about twenty-five minutes. STEP 1 : 1. Attach Back/Front Crossbar (D,E) to Top Frame (B) by using Crossbar Bolt (2) tighten with allen wrench. 2. Insert Suction Cup (4) into the hole at Bottom Frame(C). 3. Attach Back/Front Crossbar (D,E) to Bottom Frame (C) by using Crossbar Bolt (2) tighten with allen wrench. STEP 2 STEP 2 : 1.