Step 2. Extending the Belt Hitch Pin Trolley Shaft Connector u Place the belt beside the rail as shown Temporarily insert a screwdriver to the hole on the rail apart from the slot, slide the trolley to the screw driver and keep the position. Grasp the end with Trolley-Shaft Connector and pass through the slot on the Header Segment of the rail. Insert the Pulley into the slot while the belt is hanging. Secure the Pulley by inserting the 3/8" x Clevis Pin through the top of the rail.