Augsburg, Westfriedhof “Gedenken an 235 KZ-Opfer”
Memorial for 235 concentration camp victims in Augsburg at Westfriedhof
אנדרטה לזכר קרבנות מחנה הריכוז בווסטפרידהוף באוגסבורג, ביניהם יהודים
Widmung fürs Massengrab
די מאָדנע ווערטער פֿאַר די מאַסע גרוב פון 235 מענטשן
Grabstein für jüdische KZ-Tote in Augsburg
מצבת זיכרון לקרבנות היהודים של מחנה הריכוז אוגוסבורג
Мемориальная доска жертвам Аугсбургского концентрационного лагеря из России
Jüdisch Historischer Verein Augsburg 
According to our information Otto and Lilly Neuburger were buried at Jewish Cemetery in Augsburg Hochfeld.
Their grave is no. 458 in N 21.6 (i.e. grave 458 or grave 6 in row 21 of the northern part of the cemetery).
For more information on the Cemetery, its history and many buried people; see my new book with detailed grave registers, maps, some biographies, photos, etc.
https://www.amazon.de/Die-Liebe-ist-Dichtung-Stern/dp/3752856564/
The article above however refers to people who mainly were slave workers from Eastern Europe and were buried at Westfriedhof cemetery.
Let me know if you have further information on the Neuburgers.
Two to add to the list: Otto and Lilli Neuburger.