With our older 2007 PC with a standard windshield rear view mirror, since the mirror was useless for looking behind the rig, I mounted the back-up camera there, and later mounted the Scangauge on top of it as shown. Now I don't hit my head on the monitor anymore, and it is so much easier to glance at.
The bracket I used to mount the monitor is part number 250-8088 at T&A Service and Supply 800-658-3423 $48 plus shipping.
I am sure you could mount a Scangauge on top of the center mirror in the same manner.
