Do any of you use a battery nut wrench on a P11 or similar? Tired of using pliers I picked up a battery terminal wrench from harbor freight but found it was too small for the nut on the terminal of my p11, thinking it may be because I bought cheap I bought yet another wrench from wal-mart and it too was too small. I can't understand what size nut this is as none of my sockets fit"either too small or big, the standard seems to be 10mm or 5/16". Whats more the terminal is made so the nut can't be completely removed. I know this is not a major dilemma but I'm stumped. Does infiniti have an off size proprietary nut?