Insurance cuddling after death

Hello everybody, I have a situation where I need a little help. My father has unfortunately passed away and now it’s about rewriting the registered + insured cars and taking over the percentages as far as possible. Currently the situation looks like this: On my father are insured: Auto A – SF13 – Insurance 1 Auto A is my sister’s car and only ran on my father. Here my sister (13 years of Fuhrersche) Auto B – SF 1 – Insurance 2 as second car since mid 2020 Auto C was insured with SF 35 for insurance 2 as first car until September and was already sold before my father’s death. So Auto B is the successor of Auto C, but not yet “correct”. First of all, I would ask for the insurance if you would have car B on the freed SF class of Auto B. This should not be a problem as far as I know. Auto B is the car that my mother would like to keep. At the moment, however, a car D with SF 27 is already insured on my mother. This is my car, which is already registered to me, but is insured about my mother. I say yes…something entangles the whole thing but grew over the years… Now to my question about which it is mainly about… Is it now possible that I can transfer vehicle B to my M If I had to rewrite my father’s SF for the car to my mother, and then the car D which belongs to me from the insurance to me and have the SF class rewritten from the car to me (of course only the SF classes according to the 17 years I have my driver’s license)? Alternatively, I would take over the insurance from Auto B and take over my father’s SF classes as far as possible. I just thought about how I can switch to Auto B and Auto D at some point so that holders and policyholders are the same. Maybe I’m also totally on the hose and there’s a much simpler solution that just doesn’t open up to me. I hope I explained my problem so far intelligibly and hope someone can help me. Thanks already in advance for your trouble.