[a2-16v-list] Check tranny fluid

[Adam Frank]

Just wondering how to find any kind of dipstick or bolt to unscrew to check 
the transmission fluid. I havent have the tranny serviced in about 12 months 
and the shifting is getting a little stiff. I wanted to take a look at the 
color & level of the fluid, but I cant figure out where to look. Most stuff 
has been pretty straighforward since i started doing things myself. but till 
now ive never done anything regarding the tranny.

Looking down under the hood there is a large greenish inverted hex nut 
screwed into the top of the tranny, closer to the block. Is that it? I 
havent touched anything yet.

The car is a 1991 Jetta GLi.
Thanks for the input. -Adam