MikroTik Chateau 5G R16 – Which U.FL connectors (A0–A5) are for internal LTE antenna

Hi everyone,
I have a MikroTik Chateau 5G R16 (rev: RBD53G-5HacD2HnD-TC&EG18-EA).

I want to force the router to use external antennas for LTE by soldering U.FL connectors to the MAIN EXT and DIV EXT pads.

On the motherboard, I can see U.FL labeled points: A0, A1, A2, A4, and A5.
Does anyone know which of these are connected to the internal LTE antennas, so I can disconnect them and make the router use external ones instead?

Thanks in advance for your help!

There Is a thread on another board about Chateau antenna mods, including the R16:
https://confusedbird.com/thread-119-post-3083.html