It was tucked inside the case the tablet was in....along with the thin metal strips that the magnet attached itself to.
Actually quite easy and quite cheap if it worked...besides..the cost wasn't a factor. Just a fun project and seamless convenience. Walk by, pop the tablet off the wall. When done slap it back in place. No fuss and a clean look. Sadly it failed.
Okay...I would suspect because the tablet needs a lot more juice to charge than you can get from a Qi wireless charger. Look how long it takes to charge your phone over wireless.
I had my suspicions before I ordered the parts but it only cost a few bucks so why not try. I hoped the fire tab 7's wouldn't need too much juice. I was wrong.