Yes, just a plain text file with the correct name. You can just copy any of the other config files and rename it and change the content if you are unsure
It's really sad... and weird. Especially considering Frostbite 3 is one of the most unique and best engines when just tuned properly. How they messed it up is a mystery to me, but two things are clear:
It doesn't work.
They don't care.