im trying to create a sidemenu beside the exsiting one , my layout demands a secondary sidemenu that i want it to use the same functionaliy of exsitsnig MainMenu , MenuProvider , and IMenuManager.
i created a sidemenucontributer for that matter but there was no documentation to manually use the new menu contributor instead of the main one.
i put an image to show my need better :
sorry beforehand for weak illustration :) 
The red lines are the menu item i want to be added by the new menu contributori already created the layout and a customsidemenuComponent for it but i don't know how to add the new menuItem list to it
the customsidemenuComponent inherits MainHeader component from lepton Theme but it does not get a Menu parameter.
currently i was unable to find any suitable docs for this need.
i genuinely accepts any thoughts on this.
Thanks !