Hello, I am trying to connect an SXT Lite5 to a mANT 15 AX. Is there a way to do it? It will be a point-to-point connection.
Yes and no.
They are two different "generation" devices, so limits apply:
You won't have station-bridge, so, if you can do with station or with the limits of station-pseudobridge it will work. Making a tunnel over the station setting is still possible, but it is more complex to implement.
can you help in the configuration or advice the full configuration for both ?
The issue is what you have on one side and on the other.
In a perfect world a couple of devices (think of two cubes, aka "wireless wire") one device is set as AP (access point) and the other as station-bridge (client bridge), the result is a 100% transparent link from any device connected to the AP to any device connected to the station-bridge, not entirely unlike a plain ethernet physical link between two switches.
If the client is set as station-pseudobridge it should work almost the same (but - as an example - you will need to turn rstp off on the bridge).
If the client is set as station, you loose L2 connectivity and only have L3 (routed) one, this could be enough in your use or not.
Making a tunnel between the two devices re-creates the L2 link, but of course the speed will be affected by the overhead of the tunnel.
See also:
Need help setting up a bridge - #4 by jaclaz
For the Eoip tunnel there is an oldish but very clear presentation:
https://mum.mikrotik.com/presentations/TH14/anuwat.pdf