V60 coupling encoder cylinder

Hello everyone, According to Vida, when replacing the clutch encoder cylinder with the V60 (D4204T5, BJ 2014) the installation position is to be marked / have not done this work yet but for me the reason does not open up… The encoder cylinder is to be unlocked by means of special tool with approx. 1/4 revolution in the interior counterclockwise but the installation position of the new cylinder would have to be defined by the position of the two connections (inlet and outlet) or dadurc h be self-explanatory?! Can someone explain this to me or do I see something? Thank you in advance, Lg, Michael