Loosely bolt the short side of all three metal brackets against the non artwork side of the plastic fairing. Start by using the widest holes at each end of the fairing.
The rubber washer needs to be between the bolt and the front on the fairing and the thumb nut on the back side to secure the metal bracket to the fairing.
Insert the elongated end of the rubber through the slit in the metal bracket, and twist to secure.
Place assembled fairing onto vehicle roof, with metal bracket on TOP of crossbar. You may have to remove your rack sports carrier in order to attach fairing hardware.
Situate the fairing where you would like it on the car making sure it is centered. Take the rubber straps and stretch under crossbar and feed back through metal bracket to secure. Twist to lock. Make sure rubber strap is tight. Very little movement should occur.
Once all three to four metal brackets are secure to crossbar, slide the brackets forward in the middle and back on the sides in order to achieve a curve to match the vehicle profile.
Tighten bolts at plastic fairing to achieve a curve (as viewed from the top of the car) and touching in the middle and as much as possible on the side (as viewed from front of car).
A slight gap in the corners of the fairing is okay. To minimize the gap at the corners, push the tightened bracket and rubber towards the center of the vehicle to pull the corners down.
This may take a few attempts to achieve a good fit.