Dear Mr. Wisner,
Thank you for posting your question on History Hub!
We searched the National Archives Catalog for any records on “Bruenig, Wilhelm.” The search produced one result.
We also searched the European Name Index to the Series "Case Files, 1944-1949", 1944 - 1949 in the Records of the Office of the Judge Advocate General (Army) but were unable to locate any records on Mr. Bruenig.
For World War II German Armed Forces personnel information, you may wish to contact the Deutsche Dienststelle (WASt), Postfach 51 06 57, D-13400 Berlin, Germany. The web site is https://www.dd-wast.de/.
We hope this information is helpful. Best of luck with your research!