Theft protection of secret switches

Hello in the round, am new here and say first of all thank you that there are you! I recently bought a WoMo from Knaus on Renault Master 2 basis and wish me that it will stay that way longer. Now as you can read, WoMos often stolen (like probably everything else also :-)) According to my research a lot is written about secret switches to interrupt the starter relay or the fuel pump, but unfortunately nothing concrete for “my” model – I did not want to My goal: a switch or button that needs to be activated so that the starter starts with additional stop rotation of the key at position start – virtually a series switching of button/switch and ignition lock. Since I have relatively little experience with car electrics (not with electricals in general!) tips would need which line to interrupt/connect via the switch/switch to make this work. Line cross section, switching power of the switch/switch, etc. I w hot, the opinions on these anti-theft efforts go very far apart here, but that, coupled with an OBD protection and ??? costs time and thieves are always in a hurry 🙂 Thank you very much in advance! Best regards