I think you're the 1st from SECCS to try to install 'em yourself, so um, read the instructions?
You should absolutely have torque specs for the installation, and a picture to describe what washers go where.... none of us here are going to know off hand, since none of us have done the Cusco mounts yet. If they didn't come w/ instructions, call the place that sold 'em to you and tell them you're missing the instructions... they should point you to some online instructions, or at least tell you how to install 'em.