After aligning the holes on both racks, use two (C) cap-screws and lock nuts to attach. Dear Customer, Thank you for your purchase. Although extreme care goes into manufacturing & packaging of this product, mistakes are possible. If you encounter any missing parts or difficulty in assembly, etc. please call our customer service — TOLL FREE at 1-800-261-4112 for courteous & immediate resolution to your problem. Double-check that all screws are tightened securely before use. Failure to complete