How add link to parent menu which has sub menu
How to add link to parent menu which has sub menu in it
You can add the link in the sidebarextender in the sidebar module
You have to make custom MenuPresenter for your use case, please refer to documentation about it.
Marked as answered.
Due to no response from OP on potential/actual solution proposal for over 1 month.
If OP or someone else thinks this is not still solved, please respond with problem/concern.