Extracting data from multiple BMS

So I’ve connected 2x fogstar pro batteries to cerbo gx.
Both batteries view in the CERBO GX GUI including their cells info and temps etc when expanding the item selected…
See pic 1.

However when I get cerbo to publish its contents to MQTT (inside cerbo by sending a keepalive message to the CERBO).
Only one battery shows in MQTT under battery and it’s VRM instance is 512.
When I look into the second battery which isn’t showing in mqtt or the GUI summary page (second pic).

Battery 2’s VRM instance is also 512.
I understand the Cerbo can only see one battery and an aggregation script can be run to merge the two batteries into one bank.
But doing this i still cant extract the cell data as seen in pic 1.
I’d just like to extract battery data from both batteries and publish to MQTT for node red.

The cerbo sees the two Fogstar batteries on can0 and can1

Can I extract battery another way?

Cheers folks!