How would I get the outline of a loft that has been cut so that I can use it as a profile for another loft?

I have a loft of a nosecone, and I have cut the back end of it (flat part) to make it easier to make a profile for side panels. How would I get the outline of the cut nosecone (orange outline in the image) to use as a front profile of the side panels? 

Edu ​​​​​​​SOLIDWORKS ​​​​​​​