There should either be a waveguide (sort of tube) to guide the radar waves from the antenna to the electronics boxes or a cable for electric signals from the box behind the radar to the equipment by the gunner.
Not sure if this could be an issue but, the guns need to be firing at a point where the target will be sometime in the future and not where the radar is seeing the target right now. Don't know if the lobe was wide enough to contain the targets current position and the predicted position for shells to impact the target. Targets moving towards the guns will usually fly over the guns (ramming tactics were not employed to take out AA-guns) and would need to move "vertically" in the lobe. Target at the bottom of the lobe and predicted impact in the upper parts.
Only one prototype and tests were not finished when the war ended.
