We have Википедија:Водич за отпремање on sr Wikipedia and want to have it as a target for link "Upload file" ("Отпреми датотеку") in the main sidebar on the left.
Formal community consesus will be achieved here (in about 5 days); probably there will be no opposition – two admins have already voted support.
Probably, mw:Manual:$wgUploadNavigationUrl in https://noc.wikimedia.org/conf/highlight.php?file=InitialiseSettings.php should be changed. See also en Wikipedia Village pump topic from where I got pointed to this place.