What model as they have different power connectors placement.
All the model have same RouterBOARD, change only the metal box and if is it present wifi or not.
On all models the power jack is on the same identical position on the back.
No one single devices of that series I have present that problem.
Probably you use some current transformer that have the jack with bigger hole inside,
instead of the power source with regular small hole inside the jack...
Inside the box I find the european power source.