I had the top half of the intake manifold off of my 1998 M44 Z3 as part of work to replace cooling system components and fix leaking oil filter and timing chain gaskets. I started, gulp, two years ago, and then got busy with other projects. I've just about got the car back together, but there is one connector I cannot find the mate to. It is located on the left side of the engine compartment as shown in the photo, and has two leads, one brown and one yellow and red. I know, I should have labeled connectors, but I guess it seemed obvious at the time.