Wikipedia:CustomSideBarLinks
The Gadget adds user custom links to a new section above the Community Section (on the left side of the screen).
Usage edit
After one approves “adding user custom links” in the Gadget section inside the Settings, one needs to create “User:<user name> /My links” (e.g. User:Anderssøn79/My links). In order to add a link, one needs to add a new line starting with a “dot/star” (*) and then write down the ref (just as regular [[Page|Alias]] or [URL Alias]).