On the Domino Wi-Fi module is an U.FL connector located.
Can this be used for an external Wi-Fi antenna?
If so, do I need to disconnect the internal antenna somehow?
You need to disconnect the PCB antenna.
Remove R57 is a quick way. You re can remove the solder from the Domino Core Pin which is connected to R57.
Not sure if the signal will be affected.
Thank you. Will have a go at in (on the old boar 1st) 