bluetooth is a wireless tech, so no extra wires...
drop down the storage compartment door between the seats you should have a button in the door itself...
pairing goes something like:
press and hold that button
turn ignition on but dont start the car - keep button pressed for further 3/5 seconds
car will beep and 'BT Pairing' appear on radio display.
on your phone go to bluetooth settings and turn on and search for devices... it chould find the car 'BMW some no'
select that option and enter the passcode - should be in your documentation somewhere - if not on the module in the boot behind the carpet or you can ask your stealer
BT Pairing suceeded should then appear on radio display...
you can then start using the phone in the car (steering wheel buttons)...
* all that done from memory so apologies if I have missed anything...