Here you go Jan. The reproduction isn't brilliant, as the original is a 30 year old 'diazo' print, but it should give you the idea. This is as near as I could get to 1/48th scale for on-screen presentation, and note that the two lights are shown as though 'looking through' the fuselage. They were on the PORT underside - the drawing is a split image, half top, half bottom view, which is easier to understand if you had the full drawing of course!
To add these lights, ream or drill just enough to add the countersink of the 'holes' - dont go all the way through the plastic, as you won't be able to blank-off the holes, now that the fuselage is assembled. It only needs about 1mm depression anyway, just to give the effect. As far as I know, the lamps were green and red, but these might have been coloured bulbs, so a 'silver' colour would suffice, topped with either Kristal Klear or gloss varnish. It would be best to do the painting/glazing after the final clear coat, then you won't have to mask such a small area. It can be done, and does work, honest!