The explanation page How does XMPP/Jabber work? can be added to the Learn and explore link collection. The How to chat should be added to the common tasks. I understand the real dilemma here is that neither of those pages have a section for links related to chat. For now I’ve added a section called Chat and Forums to each.
As long as we’re here I would recommend giving the “How to chat” page a more descriptive title that explains exactly what it instructs you to do. It doesn’t really tell you “how to chat”, it is really about how to setup an XMPP account at May First. The same page also explains how to use your XMPP account with the May First Movim instance. I would put those details into a separate page with that title as there are many apps and clients you can use your xmpp account with and we might add some of those pages later.