I have designed my own MTC file that shows the registration marks and a no-cut area in red. This file helps me to use meximum space of the page without waste and also provides accurate results. It was designed based on the settings and size of reg marks in Silhouette Studio.
here or the image above. You will need to start every PnC project with this file as a base.
If you are comfortable with estimating the no-cut area, you can save just the reg marks to your library of shapes so that you can add them to any project at any time. Just select them and click File-Export-Sel to Basic Shapes (or Ctrl+Shift+L).