diff --git a/sysadm/mirror-operations/onboard.rst b/sysadm/mirror-operations/onboard.rst
--- a/sysadm/mirror-operations/onboard.rst
+++ b/sysadm/mirror-operations/onboard.rst
@@ -107,6 +107,11 @@
        (principal=User:mirror-test-stg, host=*, operation=READ, permissionType=ALLOW)
 
 
+How to use the credentials
+--------------------------
+
+Refer to the :ref:`journal client authentication configuration <swh-devel:journal-client-authentication>`.
+
 How to create the objstorage credentials
 ----------------------------------------