Some help new to proxmox nat

hi there, new to this scheeme, how can we join a new proxmox node that is behind nat ex 10.1.0.163 with a public 190.210.XXX.XXX ip to an other node that is in another datacenter with a public ip. when we run in the new node pvcem add 190.210.XXX.XXX it stops at quorum . any idea ? thanks