When attaching antennas:
Hold each antenna straight and twist the base to thread onto the connector.
Tighten the connections with fingers only (maximum torque not to exceed 4 in-lbs). Do not over-tighten.
S400
S450
Attach cellular antennas to the Cellular Antenna Connectors (Female SMA).
S400 only: Attach the Wi-Fi antenna to the Wi-Fi Antenna Connector (Female RP-SMA).
Optimal Antenna Position
The optimal antenna position for the antennas are:
Cellular antennas upright and angled at 45 degrees away from midline of the router.
On the S400, position the Wi-Fi antenna pointing vertically.