Contents:

The battery is in the trunk under the compartment cover.
When replacing the battery, disconnect the negative (-) cable (1) and remove the positive (+) battery fuse box (2).
Remove the battery mounting bracket (3).
WARNING - Touching metal surfaces in the trunk under the compartment cover

Do not touch metal surfaces in the trunk under the compartment cover while the engine is operating or hot. Doing so could result in serious personal injury. Turn the engine off and wait until it cools down or wear gloves to replace the battery from the luggage room.
Your vehicle has a maintenance-free, calcium-based battery.
When recharging the battery, observe the following precautions:
Reset items
Items should be reset after the battery has been discharged or the battery has been disconnected.
Kia Stinger (CK) 2018-2023 Owner's Manual: Hood Latch Release Handle
Components and components location Component Location 1. Hood latch release handle Repair procedures Replacement 1. After loosening the mounting screw, remove the hood latch release handle (A). 2. Install in the reverse order of removal.Kia Stinger (CK) 2018-2023 Owner's Manual: Selecting a Child Restraint System (CRS)
When selecting a CRS for your child, always: Make sure the CRS has a label certifying that it meets applicable Safety Standards of your country. Select a child restraint based on your child’s height and weight. The required label or the instructions for use typically provide this information. Select a child restraint that fits the vehicle seating position where it will be used.