identifying SS posting

[huddyhuddy]

Hello,
This has been taking me ages! trying to locate files from an individual and his serving from a specific period of time:
December 1941 to December 1944...from online sources he was most likely posted, breiefly at 1944 (?) at KZ Neuengamme (criminal investigation opened on him around 1961), but I am interested in learning what was his unit during the war, as indicated in the scan as "Erganzugsstelle Weichsel (XX) Danzig in Gotenhafen".

Maybe some closure will be found today!

Tnx.