/usr/share/dbus-1/services/org.kde.kscreen.service is in libkf5screen-bin 4:5.8.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=org.kde.KScreen
Exec=/usr/lib/x86_64-linux-gnu/libexec/kf5/kscreen_backend_launcher
|