Voilà!
XOCHITL SYNC
It's in the tablet's filesystem, which you can access via SSH. The idea is to download the file from the first tablet, upload it to the second tablet, and restart the xochitl process on the second tablet so it starts using the settings from the config file you just uploaded.
It's pretty simple, pull up Terminal.app and ...
- Plug in tablet A
scp [email protected]:/home/root/.config/remarkable/xochitl.conf
.
- Plug in tablet B
scp xochitl.conf 10.11.99.1:/home/root/.config/remarkable/
ssh [email protected] systemctl restart xochitl.service
Unless you've set up an SSH key, you'll need the passwords for both tablets. This page explains where to find it in the Settings screens. Note that the tablets will have different passwords.