import up ahead with course

I use Gaia gps to make routes and add waypoints.

Usually I import the routes to Garmin connect, then sync, but now I also want to show the waypoints, or up ahead points as Garmin calls them. How do I combine these in a course in connect? I didn't create these waypoints, I imported them from another source. I don't want to manually add 321 points to a 2000 km thruhike...

any ideas?