8. Place the M8 x 70mm Hex Head Bolts (#1) in'the holes:of the Plastic Block {#2) figure 3 Notelet Bolts: (#1) are hard to push through, you may need a hammer to tap the Boris (#1) through the holes, 9. Lineup the Bolts (#1) and the Plastic Block (#2) with the cone spending holes in the Right and Left Upright Tubes Secure with M6 Lock Washers {#5y and MB Note: For motors over 5HP, iris recommended to install the Plastic Block (#2) on the backside-of the Upright Tubes (33 #4 for greater stability.