add links and make draft

Author: gschatz-splunk

rum/RUM-custom-events.rst

@@ -115,6 +115,13 @@ The following examples show how to create a custom event for browser, Android, a
          ]
          SplunkRum.reportEvent(name: "testEvent", attributes: dictionary)
 
+header
+=======
+
+* :ref:`spa-custom-event`
+* :ref:`custom-events-dash`
+* :ref:`rum-custom-event-metrics`
+
 Advanced configurations
 ========================
 

rum/rum-dashboards/rum-custom-dashboards.rst

@@ -37,6 +37,8 @@ Use case
 
 The following use case features an example from Kai, a site reliability engineer at Buttercup Industries, a fictitious e-commerce company.
 
+.. _custom-events-dash:
+
 Monitor custom events and page level metrics
 ---------------------------------------------