Wireguard - Adding another site

[theprez1980]

Hey All -

Still trying to wrap my head around WireGuard as I've worked with OpenVPN and the client/server method for years.   Anywhoo - I got Wireguard working in a site-to-site configuration using this well written reference material:

https://docs.opnsense.org/manual/how-tos/wireguard-s2s.html

So I have two sites that are working fine - but now need to add another and am unsure how.

I assume on the new site:

1. Create an Instance, use same port, increment the tunnel IP address up by one.
2. On the other two existing sites, add this newly create instance as a peer?  Do I need to change allowed IPs?

Thanks

[Bob.Dig]

Just do it and if it doesn't work, we are here.