transmission fluid change - removing panel bracket nut

[moosport]

Car is 2011. To get to the fill plug, the panel bracket needs to be removed. But one of the nut holding the bracket is right behind one of the exhaust pipe. Later years bracket design is different. From videos, it can be unbolt on one end and pivot out of way.
With a box wrench, I can remove 1 of 2 nut. There is only room to put your finger on the nut. Using a flex head, there isnt enough room to apply leverage. Socket will not fit in there.

What other tools to get to the nut?

[f10_M550i]

Car is 2011. To get to the fill plug, the panel bracket needs to be removed. But one of the nut holding the bracket is right behind one of the exhaust pipe. Later years bracket design is different. From videos, it can be unbolt on one end and pivot out of way.
With a box wrench, I can remove 1 of 2 nut. There is only room to put your finger on the nut. Using a flex head, there isnt enough room to apply leverage. Socket will not fit in there.

What other tools to get to the nut?

what about a ratcheting wrench?

[moosport]

I have a set of those. Finally remembered there is crow foot wrench. which is what I needed. Picked up a set of 3/8 inch metric crow foot wrenches from HF.