Not sure if this will help, but I started using Emmy server as a backend to sort of sync my media library across multiple instances of Kodi. I first installed embycon add on, but it didn't do what I was looking for. I later found the emby addon, which worked better for me. It may be a little slower, but it sort of replaced my Kodi library, whereas embycon did not.
I think I installed the emby repository from their website, and then you will find the emby addon from there.
Good luck,
Beefpitas