Wait. So, according to the article, all of the business class cars are going to be permanently coupled to the cafe cars. It's a configuration that make more sense that what was initially reported: business class class cars being coupled to coach, and cafe being connected to another coach. That way, business class passengers don't have to walk through multiple cars to get to the cafe. But they raises the question: why aren't the cafe cars equipped with permanent couples on both sides, given that there will always be both a coach and business class car coupled to it?
Unless something has changed recently, as originally ordered BC was paired with a Coach, and Cafe was paired with a Coach. This is at odds with what the article says, though it is not clear what the claim in the article is based on. Trains does from time to time just invent stuff on their own too.

Then again plans may have changed.
According to the original plan as ordered the Midwest trains were supposed to be configured as:
Charger (H) Coach (H) Coach (P) Cafe (H) Coach (P) BC
where (H) is AAR type H tightlock coupler and (P) is semi-permanent drawbar.
This provides the possibility of adding double (H) ended Coach between the Charger and the first Coach or between the Cafe and the Coach behind it.
This makes the consist layout similar to those on the NEC with the Cafe in the middle of the train and the BC at one end. The intention was for the Coach paired with the BC to be the Quite Car.
Of course, there is nothing permanent about any such plans and they may have changed since then, the whole IDOT thing being such a chaos anyway.