Boiler part number/name?

[mwilkinsonm]

Swapping over my thermostat and I want to make use of the opentherm support, but noticed that the terminal/connection block is missing.

Any idea on the name of the part or how to wire into it without? First image is mine with it missing, second is the part in question from the web.




Thanks a lot

 

[stem]

That's been asked before, see here for the answer.