Its the Quadlock "Car - Adhesive Dash/Console Mount".
It does not go near the side screen and sits exactly in line with the A pillar so does not block your view of the road ahead or out of the side screen.
A happy discovery also is that if you turn your phone from Portrait orientation to Landscape in the holder, you can 'video' and it captures the road directly ahead - I discovered this when doing a couple of complementary laps of Croft Circuit the other week!
I ran a charging cable from the glovebox round the top of the dash (there is a gap between the metal of the dash front and the leather top roll) to just below the Quadlock. You can get powered charging heads for Quadlocks too. I used a weatherproof charging Quadlock on my Super 3 and they are great.

Heron Grey & Typhoon British Green Super 3 SOLD
Plus 6, Silver and tan.