[DG] [DG11] i60 Wind new install, no wind speed

[Whistonmarine]

I have just installed a Raymarine i60 Wind display unit, connected to a new short arm, masthead transducer.
The connections are;
Transducer to i60 Wind by supplied cable to male spade terminals 3-7 on rear of i60
i60 to SeaTalk ng bus, using SeaTalk ng cable - using the white SeaTalk socket on the rear of the unit.
Having installed as above, the i60 display reads “0” knots whilst the needle does show the wind direction (see attached short vid)
I understand that I have to calibrate the instrument, as per the Raymarine i60 manual, but I understand that the calibration is for the wind direction only (not speed)
I am wondering if the blue coloured SeaTalk socket should have a SeaTalk ng backbone terminator fitted and if this maybe the cause of the “0” wind speed display?
Comments appreciated