As always, made at my favorite TechShop (http://www.techshop.ws/) in Menlo Park (where you I hide from family some times).
Step 1: Mark the Spots for the Hardware First
Step 2: Mark the Rectangle Needed for Countersunk Hurdware
Step 3: Make a Jig and Carve Out the Cavity
Step 4: Ok, Time to Make Some Damage to the Walls
Step 5: Mount All the Hooks.
Step 6: Done!
PS: Please, no laughing at upholstery quality :) it's my first upholstery project and I learned a lot from it :) Thanks.