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Two battery terminals, one bolt down the front, pull it out. Honestly, if not sure about this one just let a battery shop re/re it for you (assuming you're buying a new one).
^Remove black cable first(-) then red(+). Remove hold down bolt. Ratchet with long extension works best. Pull out battery. Install red first then black.
As others mentioned, it really isn't too tough. The main thing you have to worry about is re-torquing the bolts back to spec. If you don't install a lot of batteries, get a torque wrench. The spec isn't very high, like 11 foot pounds. I've seen many side post battery bolts get stripped by overtightening.
Also so pretty glad to see no one bashing the op for not being very mechanically knowledgable. Post something like this on a 350z page and see what happens.
When removing and/or reinstalling the battery hold down bolt, BE CAREFUL. If you drop it, it will take a good 30 minutes or more to retrieve it. Unless you're luckier than most with a extensible magnet...
When removing and/or reinstalling the battery hold down bolt, BE CAREFUL. If you drop it, it will take a good 30 minutes or more to retrieve it. Unless you're luckier than most with a extensible magnet...
Good luck... GUSTO
One way to prevent losing the bolt or a nut that has a long reach is to take a piece of Kleenex or paper towel and place it over the bolt head / nut and then put the bolt / nut into the socket. The thin paper provides enough friction on the bolt / nut so it doesn't fall out of the socket. Once you've torqued the bolt / nut, just simply remove the socket. If you're worried about the little bit of tissue in your engine compartment, tape the tissue to the socket. Works like a charm!
One way to prevent losing the bolt or a nut that has a long reach is to take a piece of Kleenex or paper towel and place it over the bolt head / nut and then put the bolt / nut into the socket. The thin paper provides enough friction on the bolt / nut so it doesn't fall out of the socket. Once you've torqued the bolt / nut, just simply remove the socket. If you're worried about the little bit of tissue in your engine compartment, tape the tissue to the socket. Works like a charm!
alternatively, you can just use one hand to hold the ratchet and then use a finger on the other hand to hold the bolt in the socket.
Not that difficult at all. 
