There is a pic of the back nut. There is only about 1/4" of space behind the ratchet.
This was on either 5 series or 7 series but directly from below not wheel well. You won't see anything with the stiffening plate on but should see similar with It off.
I never took the pump out of the engine bay just out of the way to remove timing chain covers but I think there is enough room with the fan and shroud removed to get it out the front.