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.