diff --git a/examples/cluster_config.yml b/examples/cluster_config.yml
index 5a1f8da7..be9489ee 100644
--- a/examples/cluster_config.yml
+++ b/examples/cluster_config.yml
@@ -3,6 +3,16 @@
   hosts: localhost
   connection: local
   gather_facts: false
+  # The cluster_config role takes no connection parameters (no cluster_instance).
+  # Its modules read SC_HOST, SC_USERNAME and SC_PASSWORD from the environment.
+  # Either export them in your shell before running the playbook, or uncomment
+  # and set them here (keep the password in Ansible Vault).
+  # Set environment at play level: on an include_role task it would apply only
+  # to the include itself, not to the tasks inside the role.
+  # environment:
+  #   SC_HOST: https://1.2.3.4
+  #   SC_USERNAME: admin
+  #   SC_PASSWORD: "{{ vault_sc_password }}"
   # We do not want to reconfigure cluster with bogus example values.
   check_mode: true
 
diff --git a/examples/iso_info.yml b/examples/iso_info.yml
index fc5c2211..7b124ac7 100644
--- a/examples/iso_info.yml
+++ b/examples/iso_info.yml
@@ -5,9 +5,9 @@
   gather_facts: false
   environment:
     MY_VAR: my_value
-    # - SC_HOST: https://1.2.3.4
-    # - SC_USERNAME: admin
-    # - SC_PASSWORD: todo
+    # SC_HOST: https://1.2.3.4
+    # SC_USERNAME: admin
+    # SC_PASSWORD: todo
 
   tasks:
   # ------------------------------------------------------