If you're going for the 'retro' look, may be incorporate some retro design features? e.g. Oval-ended vents, or 'grills' in place of vents (instead of stamping out the vent home completely, it is instead punched in and left in an 'L' shape internally, so there is no visual path directly into the hole from the front and from one angle), non-flush fasteners, panel-lines used as design elements (inset edge), non-flush controls (typically sitting proud of surface), etc. The ports in an inset contrast-colour area are perfect, though that would probably only encompass the ports themselves with the button + LED separated. The window would need to go too, that doesn't match well with a retro look.