Draytek Vigor2927 Series Quick Start Manual page 20

While installing the SIM card into the card slot, note that back plate of the SIM
card slot must be removed first and the direction of card notch must be on the
left side.
There are two types of antennas provided for Vigor2927Lac, which must be
installed in different locations carefully and correctly. Wrong installation might
cause bad signal of wireless connection. Therefore, pay attention to the
installation of antennas by referring to the following illustration.
SMA jack for LTE Antenna
(with extension base)
SMA jack for WLAN
Antenna
14