Apologies if this has been posted before but I could only find small bits info so posting this to help anyone who wishes to do this .
I’ve taken a few pics but quite simple task.
I removed cards from boot /trunk of car which got access to battery .
Remove negative using 10 mm socket and I fully insulated the terminal with tape .I then pulled the fuse on lithium battery and left for 10 min plus just in case.
Disconnected positive and removed front plate and top bracket (10 mm) .
I then removed battery and did reverse to put back.
I hope this helps someone ,I’m selling my infiniti now but been a joy to drive .
I had to dremmell small piece of plate to allow vent plug to locate and previous battery in car never had vent
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Thank you for sharing!

Thank you very very very much !

Your welcome guys ,def the best motor I’ve driven it’s a shame infiniti never conquered Europe well underrated .having to actually sell car to we buy which annoys me as I’ve kept mint and fixed any issues