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Step 7: Install the backrest lever
1. The inner and outer diameters of the backrest tube are inconsistent, and the large holes are
installed inward. Use a hexagonal screw of M8*15, put a circular washer, and tighten the Allen
key.
Step 8: Install the horizontal bar
1. Place the horizontal bar on the upper arm, align the hole with the M8*80 hex screw, place the
curved washer, pass it through the bottom, add the curved washer, and tighten with the M8 nut.
