After some research I found that the command
rsync linkstationname:: <enter>
showed the array / folders.
More testing and I was able to run
rsync -tuvr . linkstationname::array1_folder/sub-folder
This took time, the disk drive lights on the linkstation were flickering away and eventually the command appeared to complete.
I was not able to find the files on the Linkstation though. I opened Windows Explorer, navigated to the "folder", searched for files but nothing found.
I tried this several times, rsync appeared to run, still can't find files.
rsync linkstationname:: showed the array1_folder but nothing deeper.
How do I verify the rsync actually replicated files onto the Linkstation?