Contact to parking brake motor. Moisture can e.g. come into the contact via the silicone seals at the pins. Or the cover may have broken. In such cases, you may have to change. Note that you need tools to 'depin/repin connectors', and should know what you are doing. Lots of general DIY videos about this on Youtube.
The manufacturer of the connector is Delphi (4w Apex Female Black Sealed Connector 2.8mm).
Recommended to be purchased together with other products. Otherwise shipping will be unreasonably expensive.