Fetch Contacts Details to Custom Doctype

ERPNext Customize ERPNext
1

I want to fetch Contacts to another Custom DocType, I have fetched Address to my Custom DocType, but I am confused about this one, Here is the code for fetching the Address one:

frappe.ui.form.on("IT Consultant", "new_address", function(frm, cdt, cdn) {
    if(frm.doc.new_address){
     return frm.call({
      method: "frappe.contacts.doctype.address.address.get_address_display",
      args: {
        "address_dict": frm.doc.new_address
      },
      callback: function(r) {
       if(r.message)
           frm.set_value("full_address", r.message);
        
      }
        });
    }
    else{
        frm.set_value("full_address", "");
    }
});