Hi Gravelgarrett,
To post a question all you have to do is go to any other post in the thread and click on "reply to this post". It doesn't matter which post you choose.
It won't show that you're replying to a specific poster but rather just present you with an empty box where you can type in any questions you may have.
For example, if you click on the "reply to this post" for this specific entry, it won't say "in answer to Brendan" or anything like that but rather just give you a clear place to type your comments.