If you mean the spring on the rear shock a good place to start is st it so the bottom of the chassis and the bottom of the rear pod are on the same plane.
Like this: _ _
If you mean the springs for the damper plates...you dont do anything to them. To adjust sis to side damping you use vaious types of silicone goo. Diff lube is great for asphalt. Keep in mind that you need a lot less damping than you might think you need....even on carpet.