Tom's BMW R850R: Defective Fuel Pump Connector
Here I have outlined the various areas in color. The yellow outlined area is what I'm guessing was intact and carrying the full current load of the fuel pump. The area in red was probably broken. The blue areas seem to be darker and may have been burned by arcing over the years. I may have things backward as far as the broken/intact areas, but it seems clear that the connector was cracked half-way through.
This means that the connector has been on the brink of failure since it was manufactured.