Zero line of wipers

Jo, a ještě lokalizovali ten šroubek na fotce, tak co to prej je zač, asi teda si myslim . . .

Chce nastavit koncový doraz stěračů ( v dolní úvrati ), dočetl se polské škodovácké bibli, že to prej de nějakym šroubkem, tak se ptá, kde ho najde a jak se to nastavuje.
Tak se ukažte, Škodamaniaci!

-> Max Shindler: This should do the trick.
BTW, I've never try to change this . . . you catch up a little bug here, then another shows there and so on . . .

OK with guys form my club we've lokalized (after 2h searching) this screw. It's lokalized above this brass covering the wippers engine. Here is the photo.

Salve Skodamaniacs again!
I have another question to specialists. I would like to regulate the zero line where wipers are stoping (point near the bottom of window). In the bible of Skoda (in Poland we call that a book of Jerzy Jałowiecki "Skoda 105-130") I've read that I can change the working-field of wippers by:
1. moving the arm of wipper (with this i can change the vertical stop point) and,
2. by regulating the bottom stop point by "a screw in the cover of wippers engine".
If looked but I haven't found it. Is this true. Wher is this screw?
Of course we are talking about Skoda 105.
P.s.
Can somebody translate this into czechs so anyone could understand this!? Thank you.