NO, wrong. Drain over the tile? HUH? The membrane has to go over the drain.
The 2" waste pipe should be plumb, centered and trimmed to the correct height. Make sure the trap and pipe is well supported so it does not collapse when you push the drain to install. Then install the Kerdi tray. Then the Kerdi Drain, glued into the pipe of course. Then the Kerdi Membrane.
Ok sorry hope I didn't offend you with my lack of knowledge. That is why i am on this website. Thanks for your time and