Lua Rollercoaster Mod little problem

Hi everyone, i have a little problem with the Lua Rollercoaster Mod: the problem is i can’t complete the track. After create the track, it does not connect me to the section of track from the start, even if I create many nodes me it just does not connect, and the cart goes off the track and explodes. Also look in-depth video tutorial, I can not figure out how to close the path. I try to see everywhere but can not find anything, also looking for help on Google can not find anything. can you tell me what I need to do to close the path?

Thanks for Helping.