How to connect metarouters

Hello, Please help me to create virtual connection between two metarouters. Example:
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You can’t connect them directly together, but you can do it through a bridge on the host.

/interface bridge add name=vm-bridge

/metarouter
add name=mr0
add name=mr1

/metarouter interface
add virtual-machine=mr0 type=static static-interface=ether1
add virtual-machine=mr0 type=dynamic dynamic-bridge=vm-bridge

add virtual-machine=mr1 type=static static-interface=ether4
add virtual-machine=mr1 type=dynamic dynamic-bridge=vm-bridge