Acer Aspire S5-391 Service Manual page 206

Route the main antenna cable to the guides on the lower case and connect to the WLAN
3.
module connector.
Route the auxiliary antenna cable to the guides on the lower case and connect to the WLAN
4.
module connector.
Service and Maintenance
Figure 5-157. Connecting the Main Antenna Cable
Figure 5-158. Connecting the Auxiliary Antenna Cable
5-102