For the console you won't need any additional wiring. The driving modes switch uses the same wire/pin as the DTC/Traction control switch.
You'll need an ODB ethernet cable connected to your laptop and the ODB port located on the drivers side near the door hinge (Should be a flap that can be opened).
I've written a guide for the E-SYS on how to add the 4VA. I'll PM you the PDF.