Looking for dokument of british jurisdiction

Hi all,

I know, this is here not the correct site for ask about this. But I have no other idea where I can ask…

I am looking by order of a time witness for dokuments of the british jurisdiction of the 8. Rheinarmee, who was stationed after the war in (Mönchengladbach?)Germany.

Important are dokuments during the time of 1945 and 1948 of Schleswig-Holstein.

Maybe someone can help or have a address to find this docoments ?

Thanks

Nils