Whale Watermaster

We have our first Autosleeper, a Broadway 2023 model.
We are on our first site that has a serviced pitch, so I hooked up the Whale Watermaster but it doesn’t do anything.
I plugged the white connector into the socket on the van, connected the hose to the tap on the pitch and turned the tap on. The flat hose expanded, indicating that water was getting to the van. After that, nothing. The water level on the control panel went down steadily till the empty alarm sounded.
What am  I missing?
I notice that there are what look like electrical contacts either side of the socket but I can’t see ant corresponding contacts on the plug in bit.

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You need to go in the control panel, select the cog and then select autofill, this turns blue when filling..  It will cut out when the tank reads 100%

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The electrical contacts are for if you use an aqua roll with an external whale pump which is inserted into the aqua roll, again you need to select the cog and auto fill but this time it will also power the pump.  I wouldn't advise leaving the shore water tap open once you have filled the tank as the water pressure may blow off your hose connection, also if you have an inboard burst you will be continuously feeding it.

Thanks so much for the prompt reply. It didn’t say that in the instruction book, I feel dumb  for not thinking of that.

Thanks again to Monty-Plym and Caraman for helping so promptly. The system is up and running. The tip about disconnecting once the tank is full is good sense and I will do that.