1969 Dart under dash wiring questions

To start, do you have a factory service manual? You can download them free from MyMopar

The radio connector "a clue" .......all orange wiring is dash dimmer controlled instrument panel lighting, controlled by turning the headlight switch knob

So far as the glove box, you say the harness way butchered.......if there is nothing hanging loose over on that side, someone may have hacked it off