In general, if you leave the 'PRO' button disabled then what's left in the UI is what you need to fill in.
Queue name, host name, port, username: From your screenshots it seems like you already know where to configure these. However, you shouldn't need to create a Channel asset yourself.
Server name: I don't know what this is or what it means, but I don't think you need it.
keystore certificate: This is the only thing you need 'PRO' enabled for, and it's configured using the 'SSL Context' parameter at the bottom of the RabbitMQ Connection asset. Click the '+' button to the right and select 'Key Store File'.
If things still don't work after configuring those then can you be a little more specific about what's going wrong? Are you getting an error, or are you simply not receiving any messages?