Hello gentlemen,
the engines are standing here (Google coordinates):
49.760023,9.525061
Watch the slanted building and the road slightly running uphill.
The trolleys almost certainly had been equipment meant for factory use and not for use in open air. Looks like a makeshift application of the whole thing and might have something to do with clearing of production areas due to the beginning of the Me 262 production in full scale. The placement of production into subterranean facilities was common practise of this time.
Matthias might not be wrong concerning the Waldwerk "Gauting"-Hagelstadt production of the Bf109. Schmoll quotes that "at least a part of the Bf109 production was moved to Bodenwöhr and Cham in September/October 1944".
A newspaper article mentions air attacks on Nittenau and Bodenwöhr-Mappach on 28, December 1944:
http://www.mittelbayerische.de/index...5&pk=12924&p=1
Cham-Micheldorf was attacked on 4, November 1944. Maybe the reason to get underground...
Regards
Roland
Btw, I´ve identified different photographs in common publications frequently captioned as "Bf109K-4s from Mtt Regensburg" as showing KZ Flossenbürg facilities. Anyone interested?