Looks like a KDO 40 with some extra modules attached.
Purpose unknown: Some kind of camera's for calibration of traing purposes?
See attached pictures
These are cameras used for training, they were recording various parametres calculated by the director.
Thanks to all for your helpayovtshev wrote
The KdoGer 40, eqiped with cameras, is prepared for evaluation of crew training.
All cameras were triggered by pressing the Start button on the KdoGer, in addition 2 cinetheodolites with exactly measured base were used for the evaluation.
Once camera films were developed and data recorded on the films was drawn on an evaluation paper, it was possible to determine the quality of firing data obtained by the crew of the KdoGer. 40.
This method made shooting the real Flaks on a target drone obsolete and allowed for very precize evaluation of crew training.
Source-Die Geschuetze,Ortungs- und Feuerleitgeraete der schweren Flak by Werner Mueller