There is no Amadeus reference for KUPs - they're all AA flights only, on AA's system only.

The UG is out of date re the (relatively recent, certainly welcome - at last) enhancement to aa.com to allow one to add non-AA numbers.

Even with your number in, pure AA itins never did/will show in MMB though.

CMT is for Amadeus so you'll never be able to use an AA record locator with it.

You have done all you can/need to do by adding your number on aa.com. That's it, you're "ready to fly".