Almost had to use voodoo....
Short answer is hang cleats.
Long answer,
They put the tile up before I got there, (not part of the plan)
I had to find all the studs through the tile, then predrill holes through it, then screw hang cleats into the studs through the holes. Just for giggles, I also mixed some epoxy to put on the back of the cleats.
Figuring out how to do something you have never done is what makes a good challenge.