One battery is drivers side near front, other one is on the passengers side back at firewall.
To keep from losing settings, you could do one at a time, but put rubber gloves on the hot cable ends to prevent a serious short. The rear battery will require some effort, look it over to see if you want to remove those parts to get it out.
See if this
video is like yours.
Unlike the video, be careful with metal tools while touching battery cables, that socket wrench would be a bad short from the other battery, if it touched metal.
