1. Align the front bar (#3) and the later bar (#4) to the holes along the inner side of the left and right leg frames (#1,2). REAR FRONT 2. Insert the bolts (#B) into each hole and secure using the Allen wrench (#D). 1. Align the backrest (#5) in between the left and right leg frames (#1,2). 2. Insert the bolts (#A) into the top holes and bolts (#B) into the bottom holes. Secure using the Allen wrench.