Often there is more space on the right so I see a few people mounting it there.
But it is further away and you will spend more time looking at it to pull information from the display.
I would mount it on the left of the Sportstar panel with a RAM ball base about half way up the panel.
Before drilling any holes I woud get the complete mount and see where this puts your iPad screen
I would get a mount with a moveable arm so you can change the angle of the screen as the sun angle changes.
For my iPad mini 6 I am using a RAM-HOL-TAB12U which is a spring loaded cradle.
I believe it works with most iPad minis and also allows for a case on the mini.
I have the medium 3 inch arm (RAM-B-201U). You can use the longer 5 inch arm (RAM-B-201U-C) but you get more vibration.
I have a twist lock suction cup base (RAM-B-224-1U) but if I had my own plane I would use a bolt on ball base (RAM-B-202U).
With RAM parts it is cheaper to buy the complete cradle, arm, base together.
For the cradle, arm and suction base above this is RAM-B-166-TAB12U. This combined part is about AU$135.
For the cradle, arm and ball base this is RAM-B-101-TAB12U probably slightly cheaper.
On the school plane they had the same cradle mounted horizontally.
A bought one of the ebay shades (similar to this but a different brand) - https://www.ebay.com.au/itm/357758936274?var=626276098411 - $20-ish.
You want the L168 for the iPad mini. I cut down the shade to 55mm above the screen/sides and tidied it up with black electrical tape along the edge.
I am planning to mount the suction cup on the left window with the iPad oriented vertically. Just waiting for the shade above.
Planning to cut down the shade on the top and left side to 55mm with the bottom cut down to just above the rubber attachment say 15-ish mm.