miniZilla

Sorry for the newbie question but I'm struggling to get a definitive answer. I've got a 2010 nismo and curious if it was standard lsd on the nismo. The previous owner swore it did NOT, found a comparison online that said yes, feels grabby at low speed like lsd, but the rear diff cover doesn't have cooling fins like many google images show.

If I jack it up and spin a tire will there be enough pressure for the viscous plates to grab and spin both forward? Short of removing the rear cover is there any way to tell for sure? I felt like this would've easy to find but my newbie skills are low apparently.

Thanks in advance!