Classic Dashboard Question - the magic behind the widget

First - yes I know we have cool new dashboards but I am still trying to learn and figure them out. 

Question - there is a default database dashboard in Orion that I would like to try and modify to fit our needs for our various levels and SQL servers and I am trying to find out what some of the widgets are doing behind the scenes.  I setup new classic dashboards but the data in the two widgets are looking at all the highest wait times not just the nodes for that dashboard. 

Can someone point me in the right direction of where to dig and find the magic behind the widgets? Is this a SWSQL item or would this be a database manager thing?  Thanks!