is there any ways to save transformation matrix using command line?

Operating system:Windows 7
Slicer version:4.2.2

I am doing BRAINSDemonWrap (command line), however I cannot find any output for transformation matrix, any suggestions how I could save the transformation matrix please?

I know we can save it if we do it manually (GUI version). Since I have a lot of files, I would like to do it in command line. Thank you.