Good morning Paul, the end of the wire shackle needs to be slid sideways slightly out of the locking slot to remove it – this should allow the cable lock to be used. To reset the code, using the tip of a nail or a biro, press in and hold the small round black button whilst you set the 3 dials to your chosen combination. Only release the pressure on the pin when you have set & noted your personal combination. The combination can only be changed when the wire shackle has been unlocked. I trust that this helps?