interface translator Canbus analogic alarms

Hello, searching material to install an analog alarm in my octavia 2he found an interface translator of Canbus for analog alarms on a Totcoxes internet page or something like that, my question is if you know what it is for and how it works, and if it will be easier to install a Spy alarm, which is a bit complicated. thank you!
Pd if you want to put the link, although I don't know if it is allowed.