Describe the feature
New cable called Interface Connector. The Interface Connector will let you connect multiple inventories to one interface, this allows for a more effective blocking mode when needed. It connects to all inventories, including machines so that the interface can recognise them.

Reasons why it should be considered
Some operations (cough cough, auto fusion crafting) requires a more advanced setup to properly function. The Interface Connector will allow for such tasks to be simplified or made possible.

Additional Context
Interface Connector can be made quite expensive as nobody will be doing complicated projects early game. There should also be a way to disconnect them from each other (or different colors) in the case where you want to build in a small area.

This would be way to narrow in terms of uses as well as the blocking mode being already nearly impossible to achieve for a single machine. (As long as forge does not provide a generic way to have a machine signal it is working).

Also most/all of it is already possible with just AE and some creativity. Therefore it would only make it easier, which is usually enough reason to reject it.