/usr/share/gnome-panel/5.0/ is in gnome-applets-data 3.18.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnome-panel/5.0/applets/
/usr/share/gnome-panel/5.0/applets/org.gnome.BrightnessApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.InhibitApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.AccessxStatusApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.BattstatApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.CPUFreqApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.CharpickerApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.DriveMountApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.GWeatherApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.GeyesApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.InvestApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.ModemApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.MultiLoadApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.StickyNotesApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.TrashApplet.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.applets.WindowPicker.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.panel.Netspeed.panel-applet
/usr/share/gnome-panel/5.0/applets/org.gnome.panel.SearchBar.panel-applet