These light assemblies only fit in one way, so I worked with the shell inverted, removed the side window strips, then placed in the light bar, reinstalled the side window strips, making sure the LED goes in without bending down. If the Led is bent when assembling, the light will project under the light bar and the illumination will be concentrated on the Led half of the car, etc. I can't find one of the amber lens filters that should be included in each of the kits, either I lost it, or it just didn't make it into one of the kits I installed.