K12 connect radio code

[Pmk10]

Hi all, thanks for letting me join your group, im new so hope this is the right place to post this, my partner has a 2010 k12 pure drive with connect sat nav/radio, i changed the battery not realising you would need a code as its a built in system and cant find the card in the manuals with the code on, ive tried all the nissan dealers round us and all want me to take it in and charge a fortune to put it in, plus i payed on ebay for the code and would not work, so if anyone can help i would be very greatfull, the numbers on the lock screen are, serial no.3130683 deviceno.7612830023 date.10.03.02 cheers ?