3hr to 5x saved locations File Transfer

Hi Everyone,
Ive sent my faulty (well loved) Fenix 3hr(second time) back to Garmin Europe.
And I was offered to upgrade,(pay extra) for a fenix 5x.
I was wondering if it was possible to transfer at least the saved locations file from the 3hr to the 5x?
Maybe someone has tried it.

I've spent a long time mapping the mountain where i live, and would ideally like
not to have to spend weeks inputting my saved locations again.
Any help will be much appreciated.
Anyway, thanks for reading,
All the best,
Sam.