The location of Frauenberg is not known exactly by me (there are more than one village with the name), but I think it is the camp near Admont, that was a former Nazi "labour education camp" (capacity: 200 persons). There exist eye witnesses of the usage for refugees.
Different Frauenberg villages: one in Styria (See Admont for archives) are near Kapfenberg and another in Leibnitz (See Leibnitz for achives).
Camp map drawn by Klaus' father during WW II
Aerial view with camp area marked in red. Source: Government of Land Steiermark
Frauenberg pilgrimage church next to the camp. Source: Austrian AEIOU database