I think that the box in the picture is the interface between Lumina Controller and the Siemens MRI scanner. Is it?
I think it should be connected in the rear of the Controller, one end to the BNC 75 Ohm and the other to the 9V input. Is it?
In this case the DC power adapter input should now be connected to this box (and anymore to the Controller) in the input on the left. Is it?
Now, what kind of connection needs the input on the right? And what kind of cable and which type of signal should it carry?
Kind regards, Paulo