Show connections in customer doctype

Hello eveyone,
I have created a new doctype called site linked to customer.
I want to see this connection in the customer menu, as for custom doctypes, but beacause it’s a native doctype, it seems to be masked. How can i make connections visible ?

Hi @damiano9,

Please check the post.

Thank You!

Thank you but i’m sure i’ll solve my problem with this.
I just want to show this connection menu, on top of customer, to link with other doctype