Correct, the plug is there but you still need to get the MAP signal to the powerlogger if you want to log vac/boost.
This can be done by locating and tapping into a wire under the dash and running that to the powerlogger terminal for the MAP signal.
I didn't want to cut into my under dash wiring so I used the harness from Julio as a simple plug and play solution. From my understanding the digital dash cars are different than the analog cars and these extra steps are required. Also, if you ever decide to run the Alky Control kit form Julio the MAP portion of the install is mostly completed by using this harness, which is a part of his kit.
Again, it's not the only way to achieve this, just an option.