Item Ref. Price ea. Qty. Description
RAM-STDARM $12.00 1 3" Black R-A-M Arm
RAM-STD $10.50 1 Standard Base
RCB-RESCVR-L+SMALL $85.50 1 BMW Reservoir Cover (Left) +
R-A-M Ball

The picture shows the smallest arm. I use a 90 degree plug into a waterproof socket on the black plastic behind the winker. When I take the side panel off, I located the quick release plug and socket in the wiring next to the connector for the winker. I used a 90 degree plug because the std plug sticks out so much that it would foul the handle bar grips etc etc
Hope this helps prospective "fitters"
It is bloody sunny over here at the moment but only 15 degrees outside with 50 mph winds.... hence being inside the finca on the computer... oh what joy
cheers
Stuart