Proxy and firewall rules

Hello, I have installed a firewall for an association and am now unsure if this is all so correct with the proxy.
For one, I created the proxy on green and blue,

then created the following rules


would this be the right way to ensure that the proxy is taken?
Or is there a good howto where this is well documented?

https://wiki.ipfire.org/configuration/network/proxy/extend/wpad