61 13... Inline connectors, 15-pin, System D2.5
WARNING: This page is about a different car, the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
Carefully pull external connector (1) in area of retaining lugs (2) apart slightly.
Pull internal connector (3) up to stop in arrow direction.
With special tool 61 0 303 press back snap-in hooks (4) of corresponding contact and pull out cable with contact.