Hey Nick, I don't know if '69 is different, but '67 the vent has 2 screws, one inside the bezel top center, the second appears to be outside the bezel, bottom slightly to the left. The headlight switch pulls out to the on position, then you reach behind the dash and there's a small release button on the outside of the switch housing. Hold the button and the knob and shaft should come out. I'm just looking at the chassis service manual for these things, I haven't done them myself. Hope this helps. Randy