If you need the SiteManager to get internet access from a WIFI you either have an xx49 model with integrated WIFI or an xx29/xx39 model with an USB Adapter inserted. Goal here is to make the SiteManager go into Client mode.
It will loook like this under DEV1. To scan for WIFI networks go to Uplink2.
Under Uplink2 it could look like this. There you can scan for WIFI networks.