Currently, for a selected item in Search result tab, one can open item's location on either active or inactive panel.
Problem is : one is not always well aware of the currently active panel whereas it's more common to have a left/right (top/bottom, alternatively) mental organization (which is way more stable as left/right concepts do not change over time

I suggest an additive pair of "open in first panel" and "open in second panel" buttons in the Search result tab
(applicable to both left/right or top/bottom dual panel settings for a given user)
Thanks