Thanks for your reply. Can I suggest something which might also solve my problem?
First of all you need to turn Bluetooth on in the new tcu. You can do this using navcoder. I suggest that you buy it. Jochen is the author and is a very helpful chap.
Once you have turned it on, with the molex card inserted it might start the pairing process - both I and another member of the forum - big bob have problems getting it to start as we don't have the handset that these tcus are designed for. Inserting the sim in the side slot may bypass that requirement and kick-start pairing.
Any questions, please ask & keep us posted.
Ps did you get the molex bit from BMW? If so, how much was it?