Hive to Taco

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Hello!

We've recently moved house and I want to bring my Tado system with us. There is a Hive Heat Link in the new place but when I have followed the installation instructions to the new Wireless Receiver (Gone from Combi Boiler to HW/CH system) the wiring steps don't match.

My question is do I NEED a NC circuit? As there isn't one present in the current hive link (Some pics below)

I think that the wiring should be as below and not as the app suggests...

It says on the labels section "May not be used" but on the wiring diagram it is missing. I'm just be pedantic I'm sure...