Private Ethernet Transport between two buildings and different subnets

Sanity check time!

Hoping y'all can help me out. I took over a customer in the middle of a WAN circuit upgrade and a "Private Ethernet Transport" connection. The two buildings are down the street from one another. Currently sites are connected via S2S VPN over their respective WAN connections (Soon to be replaced).

Main site is 192.168.0.0/24

Remote site is 192.168.1.0/24

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The ISP is telling me their router is set up with int 0 WAN and int 1 is the PET line.

I am good with the WAN changes, but I'm trying to confirm the following makes sense-

• Create new VLAN on switches at each location. VLAN 99
• Connect an access port in VLAN 99 to the next available int on the SonicWALL- X4
• Give the X4 interface an IP- 192.168.99.1/24 at main and 192.168.99.2/24 at the remote building
• At main- add route for 192.168.1.0/24 next hop X4

• At remote site- add route for 192.168.0.0/24 next hop X4

  With the routing in place, a host at each location should be able to communicate and at that point, I can remove the S2S. Correct?