After a bit of looking, the CMU of the 6th Gen is different to the 7th Gen. Whilst it's housed in the same frame - the box itself is different, as to the connections.
6th Gen - 8" Screen: (From L-R) Power cable top left, 2x USB, blue connector, white connector, single blue connector. Another connection from the screen is located on the front of the CMU, unseen from here.
7th Gen - 10.25" Screen: Power cable located bottom centre, and another cable from the screen in blue below, I imagine this would connect with the bottom right connection on the CMU. This leaves a 5 ports which I'm sure the car won't have cables ready to go into - already noting that the larger blue and white connections from the 6th Gen are different...