Originally Posted by Astelen

ehi there, happy Easter and thanks for your reply!
My problem is that I know where the hanger should be put - under the screw of the wheel - but there is also another screw that I don’t know exactly where to put it, and I don’t find it in the second pic…
as soon as I could post pictures I could probably explain myself better! Thank u again anyway

Originally Posted by jdawginsc

Don't want to hijack the thread, but where is the second screw? On the derailleur or on the frame?

Originally Posted by mrv

meh- no worries.
See my poorly drawn arrow.
That’s an M10 thread bolt. It screws into the frame’s hanger - female read.
You need about a 6mm hex wrench to drive it from the other side of the derailleur.
Possibly you have an older style frame that used a different way to attach the derailleur.
Or perhaps you got a used frame that some one set up for single speed, and foolishly sawed the hanger off the frame.
The mechanic section is helpful once you do enough posts to add photos.
Hope this helps.