Well that wasn't my question since for these inputs I would need the TID and SID already for filling these offsets, but I did not have these values.
Oh well, fixed my issue in a different way and it might be helpful for others and research to explain this.
So my problem:
I want to have a compatible German save, however the saves are language locked, so most of the files you find are in English (the same problem can be probably found every over language).
So how do you tackle that?
What I did was to look into the decrypted save of a freshly generated German save file and an English one I found online.
After that I tried to change some lines in the English save to the German one, so that I might get the German property.
This gets me the following steps:
Apparently if you take a PBR Save file with any language, get the following tool for decompression: https://projectpokemon.org/home/forums/topic/36582-pok%C3%A9mon-battle-revolution-save-research-thread/page/2/?tab=comments#comment-219653
Decrypt the save and edit the following lines in a hex editor:
0x000380-0x00039F to: 80 00 00 00 01 00 00 00 40 72 05 75 D3 5B 08 00 00 42 00 65 00 6E 00 65 00 00 00 00 00 00 00 00
and 0x0003C1 to: 4D
Encrypt it and it changes the name to "Bene", the save timer value is changed and the language is German!
Yeah and that is my discovery here.
Some further investigation can be made, which values change what and what the language value is and what it is for other languages and et volà, you can change the lanuage of a save file!