I reviewed with the Product Specialist, and here are answers. The system with the included Report Manager is delivered with containers for all modules with applicable data fields. Reports may be run using these containers (with no changes) and the Connector is NOT required ( as previously mentioned by @BillPfahnl ). If on the customer system, data fields need to be added (including UDFs) to existing containers or new containers are to be created, then the Connector IS required.
As business partners with the Connector on our systems, we can create and modify existing containers and import them to the customer system for use and they do not need the Connector. The original logic for not bundling all modules for the delivered default customer systems, was to give business partners the consulting tasks and resulting revenue to work with containers and deliver them to the customer. If the customer had that module, we might miss out on that revenue. They can say that now, but we know the real reason was to make more dollars licensing the optional modules and user licenses. Much of this becomes moot with the push to subscription, as the SI bundle is licensed more.
One thing we have discovered is if a customer wants to use a standard report within AP, they may not be able to run it, because it includes data fields from PO (if they do not have PO). With the Connector, we can remove those references from the container.
Based on all this information, I will always push the SI bundle, since eventually the customer will need the Connector.