I have a 987 (not sure on a 986) and the little metal-ish "mesh" that covers the speed 'n' tach (behind the steering wheel) is a nice little place to have it. You can run the cord down and around the gauges. Though I haven't tried, I suppose you could probably pull back the dash trim and tuck the cable behind it...? Not the best image (don't have my camera with me), but you can sorta see the mesh screen I'm talking about and where the little black cable loops around