I took the end of an extension cord and wired it to power from the switchbox below to accept the plug-in charger for the Touchstone. I had a switchbox on the opposite side of this wall that could house the charger and keep it accessible for safety and...
Test fit the depth once placed in the wall. Depending on your wallboard thickness it should sit just below the surface of the wall so you can use drywall compound (mud) to cover it.
Guide the cable so it doesn't get pinched and secure the Dock Stand to the wood backer. I used zip ties since I didn't want to damage the Touchstone Dock.
Now add a backer piece of wood above the Dock so you can screw the magnets to the wall securely. Notice I started mudding it in before I realized I missed this step.
I added some drywall mesh tape just where the magnets were just in case they might cause drywall cracking if the force was strong enough. Then start to spread drywall compound (mud) evenly over the surface pushing it into the cracks.
If you walls are textured, you'll need to texture the wall to match. If you have a special texture (other than spray like mine) you might practice on a scrap board as you want this to match seamlessly.
Once you have the texture matched, you'll paint the wall to match. I made sure to sand the lip where the Touchpad rests smooth, almost to the painters tape underneath since I wanted to Touchpad to fit as it it were on my desk.
Now to add some thin metal strips to the back of the HP Touchpad. I just used some black painted metal plates I had and some 3M Double sided tape. Bend the metal to follow the curve of the Touchpad's back.