Share my monitor configuration with KDM

Help
1

in my configuration.nix file I have the following to share my monitor configuration with GDM:

  # trick from https://discourse.nixos.org/t/gdm-monitor-configuration/6356/4
  monitorsXmlContent = builtins.readFile /home/jorge/.config/monitors.xml;
  monitorsConfig = pkgs.writeText "gdm_monitors.xml" monitorsXmlContent;
# ...
  systemd.tmpfiles.rules =
    [ "L+ /run/gdm/.config/monitors.xml - - - - ${monitorsConfig}" ];

That works for GDM. But, how do I replicate this trick for KDM? I switched to KDE a week ago, I’ve never used it before!