{content.xyz -> f:format.raw()} in the MainMenu.html don't work


I’m happy about my success to create a new ContentCollection. Now I have main, teaser, footer and my new contentmenu on the left side in the structure-area of neos-backend. Yeah!

But how can I use my new contentmenu in the megamenu as additional content?
(its necessary because the editor would like to change sometimes this content)

In the MainMenu.html {content.contentmenu -> f:format.raw()} don’t work. Only in the default.html work it.
Right? Why and whats the right way to add in the menu an content for something like Text or picture?

Thank a lot!

This seems a duplicate of Add a editable content to the menu

I am closing this one for sake of having one discussion place.