#admin.py
def formfield_for_dbfield(self, db_field, request, **kwargs):
        if db_field.name == "clinical_exam":
            widget = super(ConsultationAdmin, self).formfield_for_dbfield(db_field, request, **kwargs).widget
            widget.template_name = 'admin/related_widget_wrapper_with_id.html'
            widget.attrs.update({'your_parameter': 'you can use it after in template'})
            print(db_field)
            return db_field.formfield(widget=widget)
        return super(ConsultationAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)

#fraction of admin/related_widget_wrapper_with_id.html
 <a class="related-widget-wrapper-link add-related" id="add_id_{{ name }}"
            data-popup="yes"
            href="{{ add_related_url }}?{{ url_params }}&{{ attr.your_parameter|default:'' }}"
            title="{% blocktranslate %}Add another {{ model }}{% endblocktranslate %}">
            <img src="{% static 'admin/img/icon-addlink.svg' %}" alt="{% translate 'Add' %}">
        </a>