app/templates/admin/widgets/custom_foreign_key_raw_id.html
{% include 'django/forms/widgets/input.html' %}
{% if related_url %}
<a href="{{ related_url }}" class="related-lookup" id="lookup_id_{{ widget.name }}" title="Lookup and Add"></a>
<a href="{{ related_add_url }}" class="addlink-impt related-lookup" id="lookup_id_{{ widget.name }}" title="Create and Add"></a>
{% endif %}
{% if link_label %}
<strong>
{% if link_url %}
<a href="{{ link_url }}">
{% endif %}
{{ link_label }}
{% if link_url %}</a>{% endif %}
</strong>
{% endif %}