After (or instead of) related-link items, you can have DITA2Go append fixed links to generated lists; by default DITA2Go omits these links:
[RelatedLinks] ; Fixed links to include at the bottom after all related links items: ; AddContentsLink = No (default) or Yes AddContentsLink = Yes ; AddLOFLink = No (default) or Yes AddLOFLink = Yes ; AddLOTLink = No (default) or Yes AddLOTLink = Yes ; AddGlossaryLink = No (default) or Yes AddGlossaryLink = Yes ; AddIndexLink = No (default) or Yes AddIndexLink = Yes
The content of each fixed link is the text setting for the heading in question, found in the language configuration file; see §8.10 Localizing output headings, labels, and names. For example, in d2g_lang_en.ini:
[ContentsText] TOCTitle = Contents
[IndexText] IDXTitle = Index