A third party case to refresh the rumor iPad Pro shows the appearance of a dual smart connector port, or at least a rearranged smart connector. This case matches somewhat with the outflow CAD image, but it seems like guessing about the possibilities of the new iPad Pro.
A picture of the iPad case was posted Slash Leaks In the title of "I complained with a 10.5-inch IPAD PRO (2018) case carrying unplanned new cuts"
This picture shows the case of a tablet size device with the possibility of iPad. This includes a cutout in the appropriate location on the iPad camera, volume control, lightning port, but there is an extra cutout under the volume control. It may be an access for a SIM card slot, or it is guessing it may be a second smart connector.
Just in the 2018 iPad Pro CAD shows that the unknown is behind the tablet … NB: For that strange and unexplainable detail, I will share the CAD that I am sharing for discussion purposes Can not check the accuracy of … ? pic.twitter.com/9 R7jeLDfLV
– Steve H. (@ OnLeaks) July 30, 2018
Assuming it is the second smart connector, the port is on the wrong side. The Smart Connector is used for Apple's external keyboard cover, and volume control will be blocked when installed on the end closest to the camera. Even though the backbone of the keyboard cover is long enough to expose the volume button, it is on the bottom edge when using the keyboard and can not be accessed.
There is also a small notch on the opposite end of the case that requires a smart connector. It is probably the opening of the microphone.
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