I think you are looking for the word duty or responsibility. Not a native speaker but there is a word for something that you have to to when gaining rights.

I stand corrected, sorry!

I think you saw what I saw. The tensioned Bowden tube going from the tool head to the frame. While that might be a problem I think he asked about something else. I only caught that after reading the other comments. But correct me if I am wrong :)

Oh those are not the same?! TIL. Just thought they made it more convenient.