I can't find the transmission dipstick on 2002 Volkswagen Passat

my transmission is slipping when i drive even slow and i need to see how much fluid is in it,but i can't find the dipstick or how to put moor in.

Asked by for the 2002 Volkswagen Passat
No transmission dipstick
i got that part,but how do you fill it?
Auto or manual?
There's a drain plug underneath the trans and their a refill plug on the side of the trans on driver side