Hybrid battery is being charged by regenerative braking.
(Wheel ➞ Battery)
Kia Niro 2017 (DE HEV) Service Manual: Components and components location
Component Location
1. Virtual engine sound system unit
2. Virtual engine sound speaker
...
Kia Niro 2017 (DE HEV) Service Manual: Relay Box (Passenger Compartment) Components and components location
Component Location
IGPM
Circuit (IGPM)
ICM (Integrated Circuit Module) Relay
Box
...