Aye g80cs,
Answer to big ask!
Sally (1JK) revealed the following!
White plastic face of flasher unit with two terminals facing to rear of machine.
When sat on the bike, flasher unit horizontal spade is uppermost with vertical blade to right/offside of machine.
Horizontal spade is labelled 'B' moulded in casing. Vertical spade is moulded 'L' in casing.
In twin terminal connector on wiring loom, Brown (Br) wire socket connects to horizontal 'B' spade. Brown/white stripe (Br/W) wire socket connects to vertical 'L' spade.
After cleaning and making good connections with new unit protect with 'Vaseline' or ADF50, take care not to rot the rubber mount with it. Soak the rubber mount in 'ArmourAll' for protection, works very well at preventing perishing and breaking up of rubber components, but don't use on handlebar grips? Slippery rubber!
Regards, Bill