ansible/docs/docsite/_themes/sphinx_rtd_theme/ansible_extranav.html

<!-- extra nav elements for Ansible beyond RTD Sphinx Theme --->
<!-- changeable widget links to tower - do not change as image controlled by Ansible-->
<div id="sideBanner">
  <br/>
  <a href="https://www.ansible.com/docs-left?utm_source=docs">
    <img style="border-width:0px;" src="https://cdn2.hubspot.net/hubfs/330046/docs-graphics/ASB-docs-left-rail.png" />
  </a>
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</div>