Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
mw.util.addPortletLink ('p-tb', mw.config.get('wgServer')+mw.config.get('wgArticlePath').replace("$1", "Special:PrefixIndex/"+mw.config.get('wgPageName')+"/"), 'Subpages');

importScript('User:Lourdes/Backlinks.js'); // Linkback: [[User:Lourdes/Backlinks.js]]

mw.loader.using("mediawiki.util", function() {
    mw.util.addPortletLink(
        "p-tb",
        "https://en.wikipedia.org/w/index.php?title=Special:Search&search=\""+encodeURIComponent(mw.config.get("wgPageName"))+"\"+-linksto%3A"+encodeURIComponent(mw.config.get("wgPageName")),
        "Possible backlinks",
        "t-wdlh-check",
        "View articles where possible backlinks may be created for the current page"
    );
});