As your car may be 'European' spec this extract may not be the news you wanted
I've been emailing Nissan and a few mobile phone companies about the connection spec. The last reply from Nissan this week was
"I have sent your pictures off to our technical department, and again they have stated that there is no information available for us. The electronics and the wiring loom are totally different in the European and Japanese spec 350Z's and we do not hold specific information on vehicles we do not offer in the UK. We have sent a query to Nissan Japan, but just to make you aware they can take a number of weeks to reply. Again I can only recommend that you speak to your local Nissan dealership to discuss your options. Even if we manage to obtain a list of compatable mobile phones, they will be Japanese specification phones which can be different to the phones we have here in Europe."
But now off to try and find a post that showed what was necessary to fit the cradle and its support bits, although the wiring issue may make an aftermarket bluetooth option more practical. I will be back
I'm back, and this thread I was looking for:
viewtopic.php?t=13358
Hope that helps