L panel should be under the bracket -- it helps with tension and angle
use 3 brackets (1 on vehicle end, then skip one, then 2 on vehicle front) -- here a roof rack (but it could be your stock cross bars) doesn't allow for using 4 brackets
using a power tool makes this a lot faster:
.... 1/4 inch bolts: 3/8 inch tip on front, 7/16 wrench on the back
.... 3/8 inch bolts: 9/16 inch hex head on front, 9/16 wrench on the back
2) Install main panel
place the suction cups on the panel first, the washer should be just under the bolt
the suction cup with a spacer should go on the back side (aerodynamic angle achieved when front is shorter)
align both panels, and apply slight pressure to the suction cups resting on your clean window (you cleaned it first, right?)
Place bolt, then washer, then L panel, then main panel at the bottom
Keeping the main panell at the bottom helps to keep proper tension
3a) Maxtrax panel install (if purchased)
included is a flat piece of foam neoprene sheet, with adhesive on one side
-- this foam dampens vibrations and prevents the metal panels from touching each other
measure and cut to length, stay away from the edges except near the brackets/bolts showing here
here the sticky side is on top of the L panel. This is easier to install, and great if you always carry Maxtrax boards. Otherwise It may be more practical to put the sticky side on the Maxtrax board instead.
3b) Maxtrax panel install
install the Maxtrax mounting pins first on the panel, while it's off the vehicle
place round-bars bracket in place -- it is next to the front left Maxtrax pin in the photo. Don't tighten fully yet.
then place the Maxtrax panel on top of the L panel, with padding in between the panels
use 6+ bolts (here only 3 are used during testing)
washer should be present under the bolt head; locking nut is on the other side
Any Questions, let me know!
I try to reply quickly, and generally within minutes especially for something like Install questions! (I am on Pacific time)