In the pontiac pursuit and chevy cobalt the battery is located in the trunk under the carpet.If i want to add another battery in my car,how should I wire it?I ve never done this before so if someone have an idea

Thats convenient...

To run another battery, you just hook up the +'s and -'s of the car battery and the new battery...

oh,it is a lot simplier than I first tought,thank you for the info

i wish my stock battery was located in the trunk make stuff so much easier you lucky man!!!

Battery in the back, That is convenient, almost as if the engineers thought of putting the battery in the back for that exact reason .. ease of use for car audio..

Looks like GM finally ran outta room and can't cram everything in the front so now their putting stuff in the back.....lol