I have a Scangauge mounted as in your first picture and it has been there for 4 or 5 years, working perfectly and the digital display is fully visible in all lighting conditions. My IQ has the TNS so it couldn't fit in the centre binnacle as yours, although that is where I had a Scangauge fitted to my Aygo when I had it, some years ago. I just unplug mine from the OBD socket and temporarily poke the plug and wire behind a footwell panel, so they can have access to the socket if they need it, when it is service time. I leave the display unit in place though it is easily removeable if required. I have found it to be a useful piece of kit. John