Using the Realtime Elevator Mod
Place the elevator cabin where you want it in the build. Using the “Sneak key” place the elevator shaft on top of the elevator cabin. Continue the shaft to the next floor and place another elevator cabin on the shaft. Using the “Sneak Key” Place the elevator motor on the elevator cabin. The elevator cabins will then turn on and then may be named by entering the cabin and right clicking on the wall to set the label.
I will show a live demo of this in the next video.
Edit, Realtime Elevator Mod https://content.minetest.net/packages/shacknetisp/elevator/