Installation is simple, just slip the plate into the lower half of the clamshell as shown in the images, and shim with a scrap of thin cardboard or foam weatherstripping to prevent rattles. Another option would be to glue it to the clamshell with RTV, but this seems excessive when a simple shim seems to work quite well. Note that the plates are not symmetric, make sure the larger flat is to the left side of the car.
Please note - this item will not fit telescoping steering column clamshells without modifying the shell.