WHERE'S THE BATTERY! 2014 Charger

My neighbor has a loaded 2014 dodge charger. He asked me to help him cuz the battery is dead, I found the remote jumper locations under the hood but not the battery. Of course his car is nosed into his tiny garage and I don't have a jump pack. I pulled my battery out of my truck and used jumper cables but it just isn't enough. I'd like to go straight to the battery but don't know where it is. I'm wondering if its in the trunk. Then at least we could jump it with another vehicle running. So does any one know if it is in fact in the trunk??