Board Thread:Support Requests - Getting Started/@comment-36774258-20190805063722/@comment-26143371-20190805211331

What gets put into the sidebar on server-side page generation is so to say hardcoded. Of course there won't be a chat module of you don't have chat enabled, but you can't just edit e.g. a system message to add stuff there.

What you can do though is to modify the sidebar via CSS and JS after it has been sent to the client. I don't remember the exact rules, but afaik you are allowed to add new things, but not remove existing ones. If in doubt consult the Customization policy and the Terms of Use.

You say you specifically want to add a discord widget to the sidebar. There already is a pre made script to include Discord available. If you have administrator rights on the wiki in question you can just enable that.