Enable Auto hole cutting

In the plasmac user guide it says how to enable auto hole cutting 7.17
So how do I implement this?  To add code to the G-code does it have to be added to the post processor?  Or is it added to one of the files in the preference files?  Or does this have to be manually added to every ngc file I make from sheetcam?

So I want to add this?  Is this correct? Where does it go tho?
#<holes> = 3
#<holes> = 4
#<oclength> = .1

It needs to be in the gcode file so yes, it should be done by the postprocessor.