while driving backwards from the ampelblitzer caught – what will come to me?

Hello, I was flashed in Freiburg this evening by an ampelblitzer. when I hit the crossing, the ampel was still yellow and my cousin, who sat next to me and knows himself in the opposite direction to me, drew my attention to the ampelblitzer at this moment. I then put down a full brake and came to the stand in the middle of the cross. I then drove back and then the flash then triggered. on the photos I am but I’m not really in the cross, at most in the edge area. stop as if I had just rolled a little too far ahead. on the second photo I’m still a bit further behind – I drove backwards. the worst thing could come would be I think a fine in the amount of 10€ because I ran over the stop line or? maybe there should be nothing at all? I left a proper brake track on the cross. but I hardly think that with this kind of cross I will be able to a “lappalie” will be checked whether the brake track comes from me…especially since I live almost 1000km from Freiburg. I have already said a bit of a bammel somehow but so bad it can actually be net…in such things also a bit paranoid. greeting karl p. s.: had my cousin just said nothing…then I would not have braked and the glitter certainly not triggered