openproject/app/views/settings/_backlogs_settings.rhtml

    <p>
        <%= content_tag(:label, l(:backlogs_story_tracker)) %>
        <%= select_tag("settings[story_tracker]", options_from_collection_for_select(Tracker.all, :id, :name, @settings[:story_tracker].to_i)) %>
    </p>
    <p>
        <%= content_tag(:label, l(:backlogs_task_tracker)) %>
        <%= select_tag("settings[task_tracker]", options_from_collection_for_select(Tracker.all, :id, :name, @settings[:task_tracker].to_i)) %>
    </p>