The documentation examples, you typically find for drill down wants to go to a form/view. But if you want to go to a saved search you can follow the steps to get the url you need to link to.
That should then let you jump to the saved search when clicking in that panel. You might want to do this where you have a pie chart but want drill down to land on a table of details you built in a saved search.
Wasn't so much a question as sharing the solution.