It saddens me but I have to agree with Crab in this occasion ;-)
There could have been many reasons for the aircraft not to have used the box. The position of the chopper did not cause the crash - the landing helicopter caused the crash.
The parking position was a contributory factor, just as the reduced visibility due to the rain - but such factors did not cause the crash.
Such factors should not be regarded as ‘semantics’ but essential in an effective investigation.
Having lights on the parking box might have given a visual clue to the landing pilot that the parking was not as expected but that was not the cause - the cause was the landing pilot manoeuvring the chopper into the parked aircraft.