Simple theres a keyhole in the xk8/xkr babge on the back of the car near the boot.
a key...Charge your battery
The cadillac catera did not come out with a key for the trunk its all electronic so if your battery is dead there is a release lever in the trunk on the trunk lid.
In the trunk. There is a master key operated trunk release behind the driver's seat in case the battery is dead and the trunk will not open electrically.
Does it not have a key lock on the trunk lid.
How do you open the trunk in a 2010 toyota Pirus if dead battry
Use the key
Use you key.
With the key?
Surely there is a place to insert and use a key to open the trunk.
With your key.
use the key
Replace the battery or jump the battery.