Beam SD7 series User Manual page 23

Step 2b - Install the GPS Antenna Connection (optional)
The GPS connection is NOT optional if the tracking or Emergency function
is required. Or, the GPS connection is optional if the tracking or Emergency
function is NOT required. If connected, and tracking is enabled, position
or location information will be shown on your tracking messages and alert
messages.
The GPS connection provides a 3.3V source if an active GPS antenna is used.
Install the GPS antenna in the appropriate location and then connect
it to the SMA female connector on the antenna cable coming from the
rear of the DriveDOCK Extreme.
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