Two more drawings:
http://storage.datormuseum.se/u/96935524/Datormusuem/DEC-11-HLCA-D_LC11_DECwriter_system_engieering_drawings_MISSING_ONE_PAGE.pdf
http://storage.datormuseum.se/u/96935524/Datormusuem/DEC-11-HLCA-D_LC11_DECwriter_system_manual.pdf
The latter is very similar to the HLCB
http://storage.datormuseum.se/u/96935524/Datormusuem/DEC-MS11-HMSB-D_PDP11_45_MS11_semiconductor_memory_systems_maintenance_manual.pdf
The MS11 main manual above seems to be a later version than the one already
available