Brake switch question, wiring

[Jred]

I’m putting in a mechanical switch for the brakes. Reading the “what the shop manual won’t tell you” says “splice another wire into the red with white tracer coming out of steering column and take the other end to mechanical switch” 

I have no red with white tracer there. Only red. Safe to assume that the red is what should tap into?

[Jred]

Went for it. If anyone in the future runs into this situation, yes the solid red wire is the correct wire. Brake lights work again.