I've just found a guide to fitment in an old PM:
I found that it was best to cover thearea in selotape first of all, then blu tac the badges roughly in place just to get an idea of where things will be.
Then you need to remove the letters from the card board backing. Once you have removed the original badge, position the C and the left hand edge of the O over the holes. You should then have space in between to neatly position the L and the I. Make sure you use selotape as a level though below the letters.