Hi patilsh,
NO, it's not possible to highlight results in the second panel passing mouse on the first as you requested.
Anyway, it's possible to populate the second panel based on the click on the first panel (drilldown in the same dashboard),
To perform this workaround see in "Splunk 6.x Dashboard Examples" App ( https://splunkbase.splunk.com/app/1603/ ) the "In-page Drilldown with Perma-Linking" dashboard example.
Bye.
Giuseppe