Here's a link to the US based manufactures website for this product, Koso Ambient Temperature Guage.
To answer your questions:
1. I took a lot of picture during my install to create an album. However I will be headed out of town tomorrow all of next week, so I will not have the time to process those images and post them at this time. It's mounted with adhesive tape.
2. It's wired into the bikes wiring. My install took longer then most, as I did not want to "Hack" into the bikes harness. I came up with a solution that did not require me to do so. I made a wiring slip harness for the DC Accessory port. A simple "Plug-n-Play" electrical connection.
This looks like the same gauge footprint that would fit in the Grom handlebar mount, which I hear is compatible with the NC. Since I have 12 volts available at my handlebars already, this may be another way to go.