carom-server/billard/templates/admin/billard/locationdata/change_list.html

{% extends "admin/change_list.html" %}
{% load i18n admin_urls static admin_list %}
{% block object-tools-items %}
<li>
  <a href="{% url 'admin:process_locationdata' %}">
      LD Verarbeiten
  </a>
</li>
{{ block.super }}
{% endblock %}