air incident south of Barcelona - October 1943

[CASTELL]

Hello everyone
I ask you to help me to a subject that I do not know well enough. I am specialized in naval history, but I found an air incident in Spanish waters south of Barcelona about a german aircraft. I do not know where can I find some information.
On 10 October 1943, a Spanish ship, rescued four German pilots who were adrift 12 miles off the Spanish coast.
The name of the pilots were:
Huber Link
Hans Golle
Erns Schueter
Heinz Voskachulter
They landed in Barcelona the same day but the incident must have happened a day or two earlier.
The reports do not mention the aircraft type or origin.
Someone would kindly tell me where I can consult what kind of aircraft it was, his unit, and if anyone knows what mission should be doing?
Thanks in advance
Greetings.