This article will provide information about using a Wi-Fi USB Adapter
Connects your SiteManager to a factory access point or turns your SiteManager into an Access Point.
Note: When installed and configured in the SiteManager, the WiFi USB adapter will represent Uplink2, i.e., if installed in a model with integrated 4G (xx39 models),
The WiFi USB adapter will take precedence. Also, note that only the Secomea-provided WiFi USB Adapter is supported.
No other WiFI adapters will work.
Check the latest Secomea WiFi USB Adapter here: Accessories - Wifi USB adapter - Secomea
Remember to reboot after inserting a WIFI adapter.

Initial Contact document about the Secomea 27250 USB Wifi Adapter