You cant!
Lift up rear seat & replace battery
The rear seat should lift up, starting at the front.
the battery is located underneath the rear seat ,remove rear seat by pulling upward on front of rear seat remove from car.next remove both + and- cables then completely remove bracket that holds battery.remove battery,andsame directions in reverse order
You need to do a lot if it is like my 1995. You need to remove the back seat remove the back of the back seat remove the screws holding the rear deck.. where the speakers are. then remove the screwss... what a pain.
Rear seat pulls up and out . Then there are 2 or 4 bolts that hold the back of the seat in place. you will have to also disconect the speaker wire .
first let the seat down, there are bolts on the side of the rear deck remove and deck lid should come up
In my 2000 LeSabre, it's under the back seat. Remove the rear seat and I'll bet it's there.
You have to remove the bottom rear seat cushion by pulling up and out at the same time, then remove rear seat back by removing 2 bolts that hold it to frame. Rear shelf can be removed to gain access to speakers.
under the rear seat
remove the rear seat and send someone small with a flashlight in to find them
You must fasten your seatbelt
The rear seat is not designed to be removed. You can remove the center seat and slide the rear seat forward.