how to positively locate focus in quick settings using external keyboard to enable screen mirroring (screen black recovery)

I want to use an external keyboard to navigate the quick settings menu blind to turn on Screen mirroring (aka Smart View). I can enter this menu using Win-Q but getting a known focus or selecting Smart View is the next step. A Samsung Galaxy S6 is fully operational except it has a black screen (dropped by the kids). External mouse and keyboard are working fine and if I can just press the smart view icon on the Quick Settings the screen will mirror and I'll have full control. I am testing using the keyboard on my own identical phone so I can do it blind on the affected phone. Most usefully, Win-Q directly opens Quick Settings. Also of interest is Win-N which gives a visually identical result but with a different focus (somewhere in the notifications obvs). But, after pressing Win-Q focus seems to be a bit random. Sometimes it's under the screen brightness, sometimes it's the Settings icon itself. Direction arrows work fine to navigate, as does tab. Typing alpha (W for Wi-Fi) unfortunately seems to not move focus (wouldn't that be perfect). For the purposes of working blind I'd like to know where focus is absolutely, even if it's just a starting point. Is there a keyboard input I can use after Win-Q to either: - ideally, select the Smart View icon, or the Smart View text. Is there way to type "S" to do this? or - less ideally but still useful, set focus to, say, the top left icon (wireless on this phone)? Or is there some previous action such that pressing Win-Q gives a known focus (such as power cycling the phone)? Unavailable alternatives: - debugging is not enabled - MHL is in theory not supported by the phone; I don't have a cable to try it