Begin with the Watt’s link at the lengths delivered and adjust them if needed to center the axle. The new diagonal brace bolts into place afterward. The ability to choose from a number of center pivot hole heights is key to tuning the handling of the rear suspension. The higher holes stiffen the rear suspension, and the lower holes soften it allowing adjustment of grip to get a neutral-handling car. CorteX suggests starting in one of the middle holes.