You could make a 3d printed adapter to make that fit in the torch holder. You would have to turn off the THC, since there will be no cutting voltage. I don’t know how well it would work with the IHS system. It might smash the end of the marker when touching the material.
You might have to post process your files with the cut height and pierce height set to zero and manually set the Z-zero with the marker touching the material. Just know that it will also mark on the rapid moves between cuts with this method. You could modify the G-code to raise the Z-axis after each cut loop and lower it back to zero before the next, but then you are starting to get into more work than its worth to draw on the metal instead of cutting it.