The search function would have lead you to the posts eventually but I knew right where they were since I just had to figure out how to lift my Nismo.
Try these threads:
best floor jack for working on front and rear of 370z
Using Jack Stand...where to contact point?
The first thread has a crappy illustration from the manual. The second thread has a photo of the underside. If you scroll down the page or possibly to the next page the jacking points are circled in red.
Hope this helps,
Mick