This is what I found about about it a while ago and posted on
the Sherman Register page:
Sherman and Stuart tank hulls stacked up high, ready for scrapping shortly after WW2 at "Deutsche Werft" shipyard, Hamburg, Germany.
This shipyard was established in 1918 and built 113 submarines during WW2. Next to German labourers, the yard used several thousand forced labourers from countries including the Soviet Union, Poland, Belgium, France and Denmark. It could well be these labourers were set to work to dismantle the victor's tools of war.
Source: from a file held at the Kew Archives found by Craig Moore. Added three more photos via TankHistoria
The location of the former shipyard is known today as the
Rüsch Park.