STEP 4: Reinstall the SIM door.
Replace the SIM cover and secure with the SIM door screws.
STEP 5: Attach the LTE cellular antennas.
Attach the LTE cellular (paddle) antennas to the ports marked MAIN and AUX.
Hold the antenna straight and twist the base to thread onto the connector.
Tighten with fingers only (maximum torque not to exceed 4 in-lbs). Do not over-tighten.