how to add a link on portal header

[ammar_k]

Hello, 
I would like to add a link in employee center header menu next to (my requests, approval ) see attached photo.
could you please help me do that ? 

thank you

 

[ammar_k]

All - menus ( service portal ) 
then I've chosen the menu and added the link to the "more" in related list 
but the link didn't appear