Spring connects 36 and 24. 24 has an L shaped tab with hole. The hole in 36 is on the left upright arm near the bottom. To assemble, loosen the belt tension adjuster all the way. Put the spring end in 24 first and pull the other end to 36 on the angle shown in the diagram. Tighten adjuster so the space between the spring coils is the thickness of a dime.