If you purchased them, contact the seller, and they'll help you. If you learned by trial and error, my suggestion to you would be to not use the woodburner just yet.
"play" around with the end until your confident that it is how you'd want it to be completed. I tucked and folded and glued until I was happy with an end result. When your confident you'll like it, then get to burning!
HTH.. Wishing you luck