Burnt connections

Hello everyone, so I just got under the dash so I could start pulling out my steering column as I am rust treating my floor, anyways I noticed a couple burnt connections. I looked at some wiring diagrams but I’m not quite sure how the second picture turns from black and brown wires into red? Also where does the red and orange wire from the column go to? I daily drive this car for several months until I decided to do a full resto and everything worked on the car. Should I replace the harness...

Burnt connections