diff --git a/kafka-source.yaml b/kafka-source.yaml
index 89b6174cf..12f667dee 100644
--- a/kafka-source.yaml
+++ b/kafka-source.yaml
@@ -7,3 +7,4 @@ params:
   topic: quickwit-kafka
   client_params:
     bootstrap.servers: kafka-1.kafka-headless.db.svc.cluster.local:9092
+    # security.protocol: SSL
diff --git a/s3-config-listen.yaml b/s3-config-listen.yaml
index 524339f2f..f6065e927 100644
--- a/s3-config-listen.yaml
+++ b/s3-config-listen.yaml
@@ -1,4 +1,5 @@
 ## In order to save data into S3
+# metastore also accepts s3://{bucket/path}#pooling_interval={seconds}s
 version: 0
 metastore_uri: s3://quickwit/quickwit-indexes
 default_index_root_uri: s3://quickwit/quickwit-indexes
diff --git a/s3-config.yaml b/s3-config.yaml
index 5cf727b28..2fa1e20d7 100644
--- a/s3-config.yaml
+++ b/s3-config.yaml
@@ -1,4 +1,5 @@
 ## In order to save data into S3
+# metastore also accepts s3://{bucket/path}#pooling_interval={seconds}s
 version: 0
 metastore_uri: s3://quickwit/quickwit-indexes
 default_index_root_uri: s3://quickwit/quickwit-indexes