It is working. To verify, I shut off bluetooth on my phone, ejected data card, so the only input I have is the lightning cable from my iphone plugged into the USB port.
The cable I specified above is color coded with a green end to match the green input (port originally used for glove box USB cable connection) on the HMI, and a grey end for the port on the rear of the triple USB. More importantly, the angled notch is on the correct side for each plug, so there is no trimming needed and they snap in solidly.