Maybe you could say in the opening crawl:
“The remnants of the old empire have gathered near the ruins of the second Death Star”
This would explain why Rey and Kylo travel there at the end of the movie.
There is no opening crawl. I’ve envisioned this cut as a Star Wars story, more in line with Rogue One. One interpretation I like is that Kylo Ren was obsessed with his grandfather so he uses his connection to Rey to subtly influence her into meeting him there. You’ll have to watch the edit to see how it plays out! PM me if you want a link.