How can I implement the 'Click to Drilldown' functionality in the "Leads" graphic board in SugarCRM Version 6.5.7 ?

How the functionality of 'Click to Drilldown' is generated, which the graphic dashlets of some modules have.
I must perform this functionality for the graphic dashlet of 'LEADS' in Version 6.x (6.5.7) of SugarCRM.
I hope to get your help.

Attached image of the requested...
The requested functionality is shown enclosed in the red circle.
When you click, the selected information is displayed.

The requested functionality is shown enclosed in the red circle. When you click, the selected information is displayed.