I believe the latest M3Ws have the rectifier mounted along the length of the car, i.e. twisted through 90 degrees, but still mounted at the f/o/s (rhd M3W). Is this so?
I took a photo of what you speak of for future reference as mine is front mounted like yours. I've got new bobbins and a healthy cable tie around mine, but I will shortly pick up a HD unit.
Tally Ho ! And Welcome aboard !