First point : you should rather publish questions in "Products", instead of "Champions". Much more people will be alerted and will be likely to answers.
Now, with regards to your question: Apparently, you need to ask support to enable the Many-To-Many relationship before you can use it.
Onces enables, you will be able to publish the "edge" table first and then use it as a link target when creating link fields in the "bridge" table.
Yes - we found out today that they needed to enable Many-To-Many relationship. Once we have that then we should be able to do what we need to do.
Thanks for the heads up on where to post.
Thank you for your time.