Does not work Ldap in ralph

following the instructions here https://ralph-ng.readthedocs.io/en/stable/installation/configuration/ I don’t understand which file and which path to write to

AUTHENTICATION_BACKENDS = (
'django_auth_ldap.backend.LDAPBackend',
'django.contrib.auth.backends.ModelBackend',
)
LOGGING['loggers']['django_auth_ldap'] = {
'handlers': ['file'],
'propagate': True,
'level': 'DEBUG',
}

Tell me the full path to the file where to register this to configure ldap