hugo-theme-termlite/layouts/_default/_markup/render-heading.html

<h{{ .Level }} id="{{ .Anchor }}" class="heading">
  {{ .Text | safeHTML }}
  {{- $pageWantsAnchors := .Page.Params.renderHeadingAnchors | default true -}}
  {{- $anchorEnabledForThisHeading := .Attributes.anchor | default true -}}
  {{- if and $pageWantsAnchors $anchorEnabledForThisHeading -}}
    <a class="heading__anchor" href="#{{ .Anchor }}">#</a>
  {{- end -}}
</h{{ .Level }}>