Picture 1 shows the locking part in the open position. That little blue lever is the key. By flipping it to the vertical position it locks the male end into the female. It will not move, unlock by itself, bump open or anything like that. You can operate it easily with thickly gloved hands and in the dark just by feel.SOrry about the delay getting pics up.
The next pic shows the lever in the locked position. The two halves are a female/male dovetail of sorts.
Next shows the underside of the device holder. The male locking part is attached to a small piece of ABS that was bent using a heat gun (hair dryer works just was well). That ABS piece is held onto the holder with a 1/4/-20 screw (a M6 works just as well).
Next, the completed holder portion
Next, installed onto the receiver:
The back view:
And finally the view with the Tablet I use for GPS as seen from the seated position.
For me, its important that anything installed not interfere with any stock function nor prevent any viewing of instruments and so on.
For some riders,, having a GPS up higher works better but I've found that I don't look at it often and instead use it for reference. I want to be able to see through the windscreen and not have it cluttered up with devices that are always in my view.
By simply unlocking the mount it can be moved from bike to bike. When I park I can either tale the entire mount and device with me or just the device depending on how I feel about the surroundings.
Although this tablet is rather large, (8" display) it is super easy to read and I can also run as a side by side app, a speedo or something else if I want. It's worked in this basic design for many years and never has any device fallen out even when jarred by wheel swallowing ruts.
It doesn't shake yet the bar mount itself is vibration isolated. As you ride it doesn't flop around as some mounts tend to do, it remains steady yet protected.
The tablet I use is a Samsung Tab Active and is weatherproof, rain won't bother it as it can be submerged. I use OSMAND mapping as the navigation app and the tablet has both GLONASS and GPS sensors so SAT lockon is quick and links are reliable.