I either throw the subnet or IP, just depends on how you want to do it and as long as the firewall can route them.
On mine, Under IPv4 Local network(s):
10.250.2.0/24,10.10.10.8/32,192.168.100.0/24,192.168.101.0/24,10.10.10.7/32,10.10.15.90/32,10.250.10.0/24