AR300M PCIE connector uses?

I got the AR300M16 recently (and oh wow it is so small!) and I noticed that it has a PCIE connector

What can I use it for? Can I use it for another radio? I am not really an expert in this area

Thank you!

(I saw this thread and it said The AR300M has a non standard PCIE connector that was originally intended for the 5G card so this is why I’m asking this question)

We had a 5G wifi daughter board that make it dual band.

Unfortunatelly it was discontinued long time ago.