Attach the base Take the firebox base (B) and assemble to the firebox (A) using (8) 10MM bolts (BB) and (8) flange hexnuts (AA). Tighten Securely D AA C Assemble the Spark Guard A Take the spark guard hook (D) and assembleto the spark guard ( C) using (1) flange hexnut (AA).Tighten Securely.