How to link imported image to track solid?

I have generated a 3D Tracker Camera and a Track Solid (blue rectangle). I have then imported an image (greyish square). I would now like to match the tracking date of that Track Solid. Also, if possible, I would like to match the size and orientation of the greyish square to the size and orientation of the Track Solid.

Can this be done, and if yes, any idea how?

Thanks