Add clarification on the Splunk HEC URI

Author: trangl-splunk

admin/notif-services/splunkplatform.rst

@@ -48,7 +48,7 @@ Step 1: Create a Splunk platform integration in Splunk Observability Cloud
         - Give your integration a unique and descriptive name. For information about the downstream use of this name, see :ref:`About naming your integrations <naming-note>`.
 
       * - URL
-        - Enter the HTTP Event Collector (HEC) URI for your Splunk platform instance. To learn more, see the :new-page:`Send data to HTTP Event Collector <https://docs.splunk.com/Documentation/SplunkCloud/9.1.2312/Data/UsetheHTTPEventCollector#Send_data_to_HTTP_Event_Collector>` section in the *Documentation for Splunk Cloud Platform*.
+        - Enter the HTTP Event Collector (HEC) URI for your Splunk platform instance. Don't include any part of the URI after the port number. For example, enter the HEC URI as follows: ``<protocol>://http-inputs-<host>.splunkcloud.com:<port>``. To learn more, see the :new-page:`Send data to HTTP Event Collector <https://docs.splunk.com/Documentation/SplunkCloud/9.1.2312/Data/UsetheHTTPEventCollector#Send_data_to_HTTP_Event_Collector>` section in the *Documentation for Splunk Cloud Platform*.
 
       * - HEC token
         - Enter the HTTP Event Collector token that allows access to your Splunk platform instance. To learn more, see :new-page:`Set up and use HTTP Event Collector <https://docs.splunk.com/Documentation/SplunkCloud/9.2.2403/Data/UsetheHTTPEventCollector>` in Splunk Web .