Replaced coolant lines and during reassembly I can’t identify what plugged into a connector by ECU/DME. Two wires-orange and black (or blue?)
2010 Mini Cooper S R56 Turbo Automatic Transmission

 

Did you ever figure out what this connects to? I JUST found the same issue on my mini.

 

I'm gonna go with connector X65399: https://www.newtis.info/tisv2/a/en/r56-cooper-s-hat/components-connectors/plug-in-comb-type-solder-connectors/connectors-from-x6/x65399-x65399/SBaD5Qj. It's associated with engine breather heating: https://www.newtis.info/tisv2/a/en/r...ating/CkYCzqZ9

You have the USA version of the wiring (and not the cold weather option).

 

Last time i checked my mine that connected to the factory alarm sensor. If you have the alarm

 

in case anyone finds this page in the future or is wondering, it does lead back to the crankcase ventilation heater. it's connector x65399 as mentioned above. both my minis have this connector not connected to anything. my project mini has a code for heater activation and i was diagnosing why the heater connector didn't show ground or B+ or anything. i traced the wire and found it leads to this connector with nothing to connect to. i'm pretty sure the EMC was replaced and programed to think it has the winter package so this is not plugged in. i found the black should lead to body ground and the orange should lead to the 3rd pin up from the bottom right as looking at it, or 3rd from the front on left side when referring to body orientation (front is where the headlights are, left is driver side etc), the pin is part of a un-used connector inside the engine fuse panel, the connector is to the front right side of that panel box, it's a 14 pin connector. i'm thinking of wiring up the whole thing. it already has the relay and the fuse for it so i don't see why it should be a problem. *fingers crossed*