diff --git a/src/how-tos/connecting-to-kafka/aiven.md b/src/how-tos/connecting-to-kafka/aiven.md
index c9cb270a..3b880ba4 100644
--- a/src/how-tos/connecting-to-kafka/aiven.md
+++ b/src/how-tos/connecting-to-kafka/aiven.md
@@ -91,6 +91,7 @@ bindings:
   south_tls_client:
     type: tls
     kind: client
+    vault: client_vault
     options:
       trust:
         - ${{env.CA_CERT_ALIAS}}
diff --git a/src/how-tos/connecting-to-kafka/amazon-msk.md b/src/how-tos/connecting-to-kafka/amazon-msk.md
index 2e8f6b1e..ad53d815 100644
--- a/src/how-tos/connecting-to-kafka/amazon-msk.md
+++ b/src/how-tos/connecting-to-kafka/amazon-msk.md
@@ -126,6 +126,7 @@ bindings:
   south_tls_client:
     type: tls
     kind: client
+    vault: client_vault
     options:
       trust:
         - ${{env.CA_CERT_ALIAS}}
diff --git a/src/how-tos/connecting-to-kafka/apache-kafka.md b/src/how-tos/connecting-to-kafka/apache-kafka.md
index 49f375a6..5fbd3cc4 100644
--- a/src/how-tos/connecting-to-kafka/apache-kafka.md
+++ b/src/how-tos/connecting-to-kafka/apache-kafka.md
@@ -111,6 +111,7 @@ bindings:
   south_tls_client:
     type: tls
     kind: client
+    vault: client_vault
     options:
       trust:
         - ${{env.CA_CERT_ALIAS}}
@@ -189,6 +190,7 @@ bindings:
   south_tls_client:
     type: tls
     kind: client
+    vault: client_vault
     options:
       trust:
         - ${{env.CA_CERT_ALIAS}}