In the driver's side front wheelwell, there should be an access panel to get to both MCs. You will have to remove the tire/wheel to get to it properly, and probably contort your body some to get to both sides of the fasteners at once (I've yet to remove mine for any R&R - knock on wood - but that's how you get to those components). You should NOT have to remove the air louvers!
I realized you asked this question a WEEK ago...us SPF guys are falling asleep at the wheel...sorry.
Good luck,
-Dean #747