The octamic can get clock via either AES or WC not via ADAT, as there are no ADAT IN inputs.
Sync either via AES or WC.
WC might be easier as then you loose no AES channels and/or do not need AES breakout cables.
Otherwise via AES .. get 2 breakout cables, then connect UFX+ AES OUT with Octamic#1 AES IN.
Next connect Octamic#1 AES OUT with Octamic#2 AES IN.
The AES breakout cable:
http://www.alva-audio.de/en/aes-ebu_cab … o_8_x_xlr/
Via Word Clock:
You can plug the WC cable directly to the UFX+ to WC out, enable WC in termination in the driver settings dialog.
Then you connect it to the T-connection and put the T-Connection into the 1st Octamic (termination deactivated)
Then you connect the next WC cable to the 2nd Octamic directly into the WC plug and enable termination.
On the Octamic you need to use proper settings: Jumper 1+2 down, external sync via WC.
Material:
2x WC cable:
https://www.thomann.de/de/sommer_cable_ … arch_prv_4
1x 75 Ohm resistor
https://www.thomann.de/de/pro_snake_res … arch_prv_6
1x T connection 75 Ohm
https://www.thomann.de/de/pro_snake_bnc … 75_ohm.htm
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub13