Please, let me know if I understand you... do you already have two hosts with VMware vSphere ESXi with static IP assigned (and behind a Sonicwall firewall) and want deploy the vCenter Server from Essentials Plus kit to manage the hosts ?
If yes, a easiest way to do this is deploy the vCenter Server Appliance in one of the hosts, create a Datacenter, a Cluster and add both hosts to vCenter Server.