That's the place.
But why? Is your tranny leaking? If so something needs to be repaired.
And if you do it you will need to buy a dipstick (search the forum for what and where) so that you can detect the level. Cost of a dipstick is something like $70!
I have the dreaded o-ring disease, I believe. I have to drive 30 mins to get it in to service, so I was planning on having everything on hand in case I need to top it off before I head out. I may just drop about 1 C in anyway.
Thanks for helping verify where the transmission fluid is added.