Sketchup, while relatively easy to use and get your head around, its unfortunately not very powerful in terms of autocad or autodesk. Most of the "big boy" softwares have "slice" or silhouette
For this type of project, I would clone each panel and paste it to the side on its own, thus allowing you to have both available right there. Simple as ctrl+C then ctrl+v
so like youre making a "box" of each panel, just copy and paste each object to the side and there you have it. edit: I understand you're looking to do curves, and the process is identical here, you can manipulate the copy pasted objects independently of the main project.
edit: adding a more relevant image.
Last edited by bob493; 11-29-2019 at 08:21 PM.