[jitter] Route Jit.cellblock value to a number box

Hi

So, playing with cv.jit.trak I've thinked to link x and y values of the yellow point to brightness and contrast value of the webcam or video connected. Sound easy but.. 

I've created a new "unpack column row value", in his input I've connected the leftmost out of the jit.cellblock that should list the value of column row and value (the one I need) of the yellow point. I' ve connected a number box to the rightmost out of the "unpack column row value" that should display the value I need but it not work.!

I've tried other combination and object but I can't arrive to solve it, maybe I'm totally out of road.


Someone have idea please? thanks

Filippo