This may be of use?? or not
Had my super dupa Yellow Optima battery die last night, so needed a new one asap, Optima is only 2yrs old so NOT buying another one of them.
So... if you have a import 350z the battery have smaller terminals than UK car finding a battery can be a bit of a hassle.
Andrew Page has them on stock that will fit no probs, YUASA SMF BATTERY 12v 400A YBX3053 COST £41+vat. 3yr guarantee :-)
They come with small terminals and adapters which simply pull off to allow the smaller JDM terminals to fit straight on.