Right hand brake light/blinker not working

So I have a 1990 Chevrolet Astro. My right hand (passenger side) brakelight/blinker doesn’t work when I flip my turn signal stock. I looked under my dash at some wires and found that there is an electronic box connected near the top of my brake pedal.

In this box is space for three wires with the middle space empty. The top wire is white. The middle wire space is empty. The bottom wire is two orange wires.

Separately, there is a red wire dangling down, unconnected to anything. Is it safe to assume that red wire goes in the middle space?