The RSC90 will receive a CR110 brake pedal, originally the cable attaches to it by means of a pin that goes thru the pedal and the end of the brake cable which is a flat piece of steel with a hole in it, as can be seen in the picture of this original CR110:
This is not a standard available cable part, nor is there a similar cable which could be used as a donor.
Therefore today I went to play on the lathe and created a few:
Still needs some finishing and I want to experiment in making them thinner, but then they will also go to the zinc plater. When they come back, I can finish the new rear brake cable.