ROHS ARES-5300 User Manual page 71

Prepare the WIFI-IN1300 Wi-Fi module kit. The module is a half-size
3.
module of PCI Express Mini-card form factor, with two U.FL connectors,
one is "MAIN", and the other is "AUX".
4. Plug the Wi-Fi module to the socket's connector by a slanted angle. Fully
plug the module, and note the notch on the wireless module should meet
the break of the connector.
Fully plug the module.
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Two U.FL connectors,
one is "MAIN", the other
is "AUX".
Connector
break