Can I connect my ZBT-1 to my existing Smartthings Zigbee network

I already have a Zigbee network with lots of devices connected created by my Smartthings station. I just purchased a ZBT-1 and would like to connect it to the same network so I can migrate off of Smartthings. If I can’t connect it to the existing network then I would have to create a new network and add all my devices to the new network. Can someone provide steps for doing this including how to get the network information from Smartthings?

Or is there another way to simplify this process?

Device are paired to a coordinator. You cannot have multiple coordinators on the same zigbee network.

SmartThings allows a primary and secondary coordinator. Can I somehow add the zbt as a secondary coordinator and then remove the primary coordinator?