Thanks, even though I understand that there is no way to have this shortcut properly with Nautilus 42.6. I don't want to use Nemo; it's quite annoying to remove useful features!
I tried Nemo but it wasn't mine so I continued using Nautilus. And there is one Option that you can use to get a Desktop Entry at the Side. Look at the Screenshot please:
You see at the Side at the Bottom ''Schreibtisch''. That is the german Word for Desktop. I would realy prefer to have it IN the Group above but so ... it is there. There is no other Option so I must take it like this or ... nothing. If You can live and work with that You could make it like this, too.
You simply take the Desktop Icon (on the Picture it is called ''Schreibtisch'' again) what You can see at the right Side in the first Row the first Icon from right. Move it with the Mouse to the left to the Categories. Than it lands at the Bottom between the Trash Symbol and Other Places.