Well the JB+ runs inline with the TMAP sensor, which is on the chargepipe by the diverter valves. You may have to remove the airbox to see it.
JB3/4 would be installed in the ECU box. With JB4, you can just go into the command mode (hold volume down and channel select down) and the instrument cluster will turn solid orange. Procede is also installed in the ECU box, but has slightly different controls for the command mode.
If you want to be absolutely certain, just look in the ECU box. Getting into the ECU box isn't difficult, there's just a lot of steps that make it seem overwhelming the first time. You could also see if anyone in your local section can give you a hand.