Hi Mark, I've tried to connect to a Mack truck today however wasn't able to connect my phone to the adapter.
When I plugged the adapter in it started blinking blue. Then, when I tried to connect my phone to the adapter it went green briefly but then the phone said "The username and password for the adapter do not match the username and password for your phone" (or something along those lines), and then it went back to blue. I tried a number of times but was unable to get it to do anything differently. I also can't find anywhere to enter any username details.