https://images.clickdealer.co.uk/vehicles/4673/4673250/large2/106374795.jpg
On side of the front seats in my car but location varies from car to car.
Older clios have one like this...
Mine has been doing this for past 4 months. Only happens when its cold outside and I can make it disappear by turning off seat heater and rear window heater. Recently had battery checked, test returned 564/600A = Excellent health. Starts without issues and when there's 0+ C outside warning does...