/usr/share/dbus-1/services/ is in mate-applets-common 1.20.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbus-1/services/org.mate.panel.applet.AccessxStatusAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.BattstatAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.CPUFreqAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.CharpickerAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.CommandAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.DriveMountAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.GeyesAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.MateWeatherAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.MultiLoadAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.NetspeedAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.StickyNotesAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.TimerAppletFactory.service
/usr/share/dbus-1/services/org.mate.panel.applet.TrashAppletFactory.service