from WHEN does the kfz insurance apply?!

moin gaaaaaaaaaaaaaaaaaaaaaaaanz stupid thing! this morning on the way to the registration office I’m a nice lady on the back of it. totally pillepalle, number plate bent and who comes up at the zafira from the victim n scratcher in the stupidest fall. I guess the speed at 2 km/h who ever. stupid thing at all. even dumber but the situation that the box still had its old numbers and was still allowed to the old owner. I was just on the way to the amt…15min later the cart was allowed on me. now the question: from WHEN is the car considered insured on me? from this morning 0hr? so was the eimer theoretically already allowed on me? I ask so stupidly because I have a very “inner” work relationship with the owner (btw a business colleague whom I know for over 10 years already) and I don’t want to make him any worse. that I pay the harm myself because nothing really will be wild is also asked except. I would old just like to take over completely myself because I also screwed up.