/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.NTPConfig.service is in system-tools-backends 2.10.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [D-BUS Service]
Name=org.freedesktop.SystemToolsBackends.NTPConfig
Exec=/usr/share/system-tools-backends-2.0/scripts/SystemToolsBackends.pl -m NTPConfig
User=root
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