Hey, maybe someone can help...

MikroTik LtAP LTE6
There is an idea connect Mant external antena to it. Do i need a pigtail with SMA female to U.FL male? Can you confirm which exact type I should buy?
Regular ACSMAUFL pigtails don’t snap in — the socket on the board is deep and u.fl is female.
So now i dont know what exact pigtails to buy.
Thanks.

Looks like MMCX socket for MMCX connector

Looks like MMCX socket for MMCX connector

There are 2 of them, so are they used for LTE or something else like wifi? Or I need to disconnect internal antena to use external antena?

Do not know ... just identified the type.

The connector on the board in the image is not ufl, it is mmcx, see:
viewtopic.php?t=178743
viewtopic.php?f=3&t=173681

Mikrotik sells a pigtail (for Basebox) that should do (but it has to be checked, maybe it is too long:
https://mikrotik.com/product/ACMMCXRPSMA

The connectors are for Wi-FI external antennas.

So for external lte, there is only one option to unplug internal antena?

The MMCX in photo are 2.4Ghz Wi-Fi.

So for external lte, there is only one option to unplug internal antena?

Correct. You connect the U.FL pigtails directly to modem. So there is no switch between internal/external possible with LTE on LtAP.