I ordered a DELL Latitude 7340 via my employer. This laptop has "Eine keilförmige Vorrichtung für Sicherheitsschloss". This nonsense translation actually means the Wedge-shaped lock slot.

There is no specification which exact kind of lock this is for the 7340. I ordered the only option I had: the Dell Kensington Clicksafe NB Lock (DELL CLICKSAFE 2.0 KEYES LAPTOP LOCK O6DK21). Neither of the two delivered Wedge-Shaped Anchors fits, both are too big. If I try to apply it, all that happens is that the laptop gets damaged (scratched).

What is the fitting anchor specification for this lock? And where can I order it?