Pop the Hood.
Remove the only two screws that hold in the passenger side plastic grill just below the passenger side windshield.
This is the piece you are removing. See the two holes?
Lift grill straight up. You have to be careful on the center part (windshield wiper is in the way a bit) and the far right passenger side connector (where it has to be maneuvered near the hood-corner junction).
See the five rectangular plastic plugs built into the car where the matching plastic pins from the cover go into? The one in the far LEFT of the PICTURE is hard to see because it is in the corner.
Here is the UNDERSIDE of the cover. Again, five plastic protrusions are visible that go into the car's matching holes. The one on the far LEFT of the PICTURE is hard to see, but it is there.
There is the cabin air filter...right behind the battery. It is in a black plastic frame. Mess with the tabs on the top of it and it tilts toward the front of the car then slides out straight up. FYI there are two pins on the bottom of the frame that slide into slots in the bottom when re-installing:
See that oval grommet? Clean that sucker (Leaves, etc.)! It has a little slot in the bottom of it. Just put your finger in it and make sure it is clear. If it clogs, the whole filter compartment can fill with water and literally fill your interior with skanky water!
Farther back view of grommet location:
Make sure to install NEW filter so the arrow points toward interior of car!:
Filter was skanky and stinky when A/C was turned on. Car only has 8,000 miles on it: