Fiamma door lock

Hi, I've purchased a Fiamma safe door not the one that you drill
into the frame, not 100% re fitting it, don't want to appear a silly woman but want to make sure I don't drill through the walls of my nuevo wrongly, if anyone has fitted this lock can you tell me if you drill from the inside of van the 4 holes and add the main body of the lock after, I've u tubed it but can only find the frame one .  Thanks

How's your German?

https://www.youtube.com/watch?v=ys2coXIqs8E

Saw that, ok with Spanish but not German

Fairly self-explanatory from the film though, even if you don't get the words . . .

Ok thanks I'll watch it with the sounds down

Managed it