ADVANSEA SPEED S400 Manuel Utilisateur page 21

3.2.3. Connections
Connect the speedometer sensor to the LT8 connector
Connect the - power to the black wire without connector and the red wire
to the + power via a switch and a 1A fuse.
For a system comprising several "Advansea" instruments, connect all the
orange bus wires from each instrument together.
Connect an NMEA source (GPS for example) to the yellow wire for the
+nmea and the black for the – nmea
See diagram below:
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Installation and Operation Manual S400 series