app/soc/templates/modules/gci/homepage/_leaderboard.html

<div class="block block-leaderboard-link">
  <div class="block-title">Leaderboard</div>
  <div class="block-content">
    <a href="{{ leaderboard_url }}">See the Leaders!</a>
  </div>
  <div class="leaderboard-link-image">
    <a href="{{ leaderboard_url }}"><img src="/soc/content/{{ app_version }}/images/gci/block-leaderboard-link-trophy.png" /></a>
  </div>
</div>
<!-- end .block.block-leaderboard-link -->