https://www.destaco.com/clamping/manual/hold-down-clamps/hold-down-clamps-247-267/productdetails.247-U.html (link to download the clamp shown in the video)
This video covers the difference between As-Built Joints and Joints, and when to use one over the other. Also covered in the video are Rigid Groups and Joint Origins. Along the way I show how tools for selecting points when creating joints as well as how to set joint limits.