Camera Alignment

For the simplicity of usage, we want to get our camera aligned to the same direction.
The approach we tried first is to draw the points to a paper as show in the figure:

The distance of the two points is exactly the distance between the two cameras.
Then we can open the image acquisition tool box in Matlab, aim the center of the first camera to the first point:

And aim the center of second camera to the second point:

And after I aimed two cameras to both of the points, they should be aligned: (See figure)