I installed the transmission in the frame, mounted it to the engine block, connected it to the drive shaft, assembled the clutch throw-out mechanism, attached the speedometer cable, the neutral switch wiring and the foot shift.
I also installed the handlebars, perches, switch assemblies and routed the cables. Since I am converting the RS to and RT configuration, the switch wiring and cables are RT length.
You can read about how I do this work here:
I also made a video summarizing the transmission installation.
VIDEO: 1983 BMW R100RS Install Transmission
Some pictures of the work.