Possible II/KG51 Victory on 12th of April 1944 against B-1742-97556. Was it II/KG51 and who was the pilot?

[Mysticpuma]

Basically the topic is the question.

I was reading about the shooting down of B-17 of (I think) the 390th BG listed as B-17 GSH, 42-97566 as it made a final approach at Parham at 00.05am, flown by Lt Donald M. MacGregor, when a Night Intruder Me-410 approached unseen from behind and shot it down.

I'm wondering if there is any detail confirming which aircraft was used (markings) and which pilot of the Luftwaffe was or could have been credited with that victory?

Thanks for any help, cheers, MP