Container networking, confusion about how container source IP

I have an HA proxy container setup connected to a /30 subnet network. I see the listeners on port 443 and 80 in netstat -pnl, however I’m having trouble seeing traffic routed by the container.

I’ve taken the config from a known working haproxy, but I’m unsure what the source IP I should expect to see traffic come from.

Vyos is connected to another router with an OSPF network, this is where the backend haproxy redirects traffic, so I need to be sure the source IP of HAProxy is in the routing table.