Google Linking account in own deploy

[tomtom30]

Hi,
I have my own deploiement working good with Alexa. Thanks for that !
Now I try to link to google.
When I add my device on google with Node-red home smart home control, it call cb-net.co.uk.
How can I call my own instance here? is it posible firstly ?
I don't find the information docs.
Thanks for helps
Tom