LtAP WiFI connector labelling

Can anyone tell me which of the MMCX connectors is chain 0 and which is chain 1?
Also, between the built in antennas and the MMCX connectors, which is antenna A and which is antenna B?

I have a single chain, low bandwidth application so only want to use one chain, but don’t want to accidentally enable the wrong one and damage the output circuitry

Don’t know if it helps,

FCC Report on the LtAP
https://fccid.io/TV7LTAP2HND/Internal-Photos/Int-Photos-4173799
23-09-_2021_01-01-35.png

That would indicate that the MMCX connector next to “Antenna 1” is Chain 0.
I’ll give it a go and see what happens

I’ve had a play and worked it out.
The onboard antennas are “Antenna A” and the MMCX antennas are “Antenna B”
Antenna and MMCX connector nearest the corner of the PCB are chain 1
RR6eFo9eC4.png

Please read this thread: http://forum.mikrotik.com/t/ltap-wlan1-mmcx-pcb-socket-antenna-selection/147823/1

Regards.