4 Way Flasher Location

I have a matching numbers 1970 340 Swinger. I removed the glove box in order to replace and found the flasher just sitting loose, resting on the inside lower part of the dash ( passenger side ). In reading the 1970 Dart service manual this flasher is supposed to be mounted at the left lower side of the glovebox, But I don't see any mounting device or bracket. Something must be missing here. Also there is a brown coloured wire that is fastened to the upper inside dash ( passenger side ) but not connected to anything at the opposite end. Appears to be original to the car. This wire has no power, Maybe a ground wire but for what? Car is not equipped with interior glove box light. Thanks