Follow these instructions to install the Optional Support Spindle:1. Remove the two button head screws located on the right side of the fan panel, using a 5/32” hex key wrench. 2. Remove the black vinyl molding of the extruded frame member, located next to the empty screw holes. 3. Insert the ‘drop-in T-nuts’ and align them to the empty screw holes on the fan panel. 4. Remove the Optional Support Spindle mechanism from its box and unwrap it, separating the screws. 5. Align the bracket holes with the T-nuts inside of the extruded frame member and screw them in. 6. Tighten the bolts firmly.