My cable is setup on com 4. There is a file you can edit to set the com to whatever you want. I'll have to try to find the instructions I used.
06 330i 6mt Spt- Eibach Springs, BMW Perf Susp, Supersprint Exhaust, BSW Audio
RIP-94 325i 5mt 4d- M3 springs/susp, Z3 wheels, Chipped, Intake, Exhaust= FUN!