External antenna on the Homey Pro Mini

While taking apart the Homey Pro Mini to replace the CM4 with an 8GB one, I noticed there’s an antenna connector on what seems to be the Zigbee/Thread antenna. Does anyone have more information about it?

I’m interested because I’ve been spending the last few days testing the Homey Pro Mini quite extensively. Temperatures don’t really worry me too much, but I like all the devices I use to run as cool as possible, so I’ve been designing a ventilated enclosure for it over the last couple of days. The idea is to mount it vertically on the wall so cool air enters from the bottom and hot air exits through the top.

And if that connector is actually functional, I could look into adding support for an external antenna to the design.