Dunno how I just noticed this, but... is there supposed to be a splash shield panel in the wheel well here? This is on the front driver's side looking in at the transmission.

 

^
If you don't have the #12 left air screen plate below on hand, that possibly could be what you are missing?

 

Thanks Zeta.

Hadn't had a chance to double check this yet. But on the other side, there's a panel that I need to remove to access the serpentine belt and pulleys. I was just assuming there should be something similar on the other side, but maybe protecting the pulleys from road debris is more important than the transmission casing/fill plug.