[LongMan]

From first post

Once you've installed one (or more) of these test builds on multiple devices you are ready to go:

Start (at least) two of the test build installations on the same local network
Make sure that the UPnP server is enabled (see Settings -> Services -> UPnP/DLNA -> Share video and music libraries through UPnP
Kodi should automatically detect the other installation as a potential media provider and show a Kai toast with the name and the logo of the detected media provider
Go to Settings -> Media sources -> Media imports -> By media providers and you should see a list of detected media providers by their name
Open one of the listed media providers and you should see a list of defined media imports (obviously this will be empty at the beginning)
Choose Add import.. to create a new import and then choose one of the listed media types from the dialog
You will see the Media import information dialog with some details about the import and some settings which you can adjust to your liking (these are not fully integrated yet)
Close the dialog and Kodi will automatically start synchronising all media items of the specified media type from the media provider
Repeat the last three steps for all media types you'd like to import items from the media provider

Hope that helps.

Cheers,
LongMan