Bruker:Vegard Pettersen/common.js:

mw.util.addPortletLink( 'p-personal', '/w/index.php?title=Special:MyPage/Sandbox&action=edit&preload=Template:User_sandbox/preload&editintro=Template:User_sandbox', 'My sandbox', 'pt-mysandbox', 'Go to your sandbox', null, '#pt-preferences' );