I have just bought and old R80 RT which is a runner but there are a number of things I'd like to do to keep it working.It was sold with an owners workshop manual (Haynes BMW Twins) but this omits basic information on the body work.For example, a view of the instruments and what does what, the various locks and their keys, there is a female plug on the left side but the manual doesn't refer to it anywhere.I think I need a "Riders Handbook" for this and have searched the net without success.Does anyone have suggestions on where to look, other than buying another manual?Cheers 😕