Mitel (Inter-Tel) Attendant Console comes in two flavors: Single-Node (Stand Alone) & Multi-Node (Networked)
Currently your Node2 console is pointed to the Node2 system. If your Node2 Console software turns out to be licensed for Multi-Node, all you need to do is point it the the CT-Gateway instead of the Node2 system. The CT-Gateway combines the info of both Nodes. If it is Single-Node, it will need an upgrade to Multi-Node first.
After it has connected to CT-Gateway, you will have the ability to hide any of the Node1 extensions that you don't want the Node2 operator to see/monitor, if needed.