Two people (including children) should never attempt to use a single seat belt. This could increase the severity of injuries in case of an accident.
Kia Cee'd JD Service Manual: Components and components location
Components
[AFLS ECU]
...
Kia Cee'd JD Service Manual: Components and components location
Components (1)
[Rear seat back]
(5Door)
1. Rear seat headrest [LH]
2. Rear seat headrest [RH]
3. Rear seat headrest guide [LH]
4. Rear seat headrest guide [RH]
5. Rear seat belt outlet cover
6. Rear center seat belt r ...