Please tell me - should I put something into these two holes on the top of R-D16? Or do I only connect the R-D16 with the lower rotator of NN5 by one screw?? I can't find the information anywhere. I think it can twist without something connecting both parts more than one screw. In the original NN5 rotator there were 2 little screws that locked the rotator in only one position. Waiting for your help.