There are post show which port to use. As for network discovery, there are posts for this. These discussions date all the way back to the beginning of tablo, almost.
Here’s a couple of hints to get started…
Then from there you can dig into the JSON data for recordings, not on drive. I have found a script to use directly use ffmpeg with the playlist somewhere on github. Nuvyyo (Tablo’s parent corp) still has their old kodi scripts there - you can dig a lot from there.
You can follow through suralatablo.py it’s readable. You can search outside tablo and (maybe still) find information and this Unofficial Tablo API Docs & Info
These are, of course, for network connected devices.