Rack assembly screws Rail Fan hole with cover Middle ransom Lower ransom assembly screw Number Lower ransom lower transom 508 460 I I A. Middle transom and B. Lower transom direction | E and assembly screw Assembly holes Front View Side View 6 Caster 4 pcs Rack assembly 5 screw 24 pcs 4 Transom 4 pcs Middle transom 3 Rail 4 pes . . 2 Button base 1 pcs D.