Install instructions available here and you can take a look.
As others have said there are other tunes you can have on your vehicle without knowing.
You can have an array of flashes, Giac,Renntech,Dinan, ESS, ETC (You wont be able to see these but you could contact dinan to see if your VIN matches).
You could have a Vishnu PROcede, SSTT, or even JB+ too (which can be found under the hood). The latter 2 would be plugged into the TMAP sensor right before the throttle body, the PROcede would be installed just like Jb3 and Jb4.
Last but not least you might have a JB3, in which all those steering wheel function the above posters mentioned wouldnt work.
I would pop the hood and the ecu cover and take a look.