I am unsure what you are asking for but I went ahead and put a black outline on the cut areas, hoping that this is what you need.To do so, I had to convert your pattern to a jpg then change it to black then run it through Inkscape. After doing a trace bitmap, if you go to the lower left corner you can right click fill and/or stroke, then using "paste color" you can change the colors of the outline and/or the cut areas. Hope this helps you.If not let us know and I am sure someone will be able to help.
For a first or 20th pattern attempt, your pattern is great!!
Don R