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.

Screw the wood backer in with some drywall screws, and then hollow out a shallow void for the neodymium magnets to fit into.

Screw two neodymium magnets to the backer wood, making sure to keep them just below the surface of the wall.

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.

Spread it smooth so you won't have to do a lot of sanding later, but you may have to sand and do another thin finish coat.

Sand it smooth and feather the edges.

Test it with the HP Touchpad to see if it charges through the thickness of mud. IT DOES!

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.