Hello,
The connectors are available, either at specialized dealers (look for AMP junior timer) or BMW dealer with the correct set of wires to fit the bike and the modules.
In France, a lot of people have assisted the points with various electronic modules from cars like the Renault Super 5 which has a module (like a small relay) made by Cartier which is straightforward to install and cost around 5 Euro in a junk yard. Plenty of such devices available from car of this era.
If I had to install an electronic bean can, I'll buy the later Bosch double coil (which is an improved version versus the "crack-O-matic" grey coil), an ignition module and the wiring. Not cheap but easy to install and good for a lifetime...