The whole lot fits beautifully in the recess of your bootlid, this is easy to do, and it will make the rear of your mini sexier too (and it will add 10HP to your motor

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First of all, carefully remove the wires from your number plate light, remove the actual light assembly from the flap too.
Lift up the flap to reveal the hinge screws. These need undoing. You may need to drill them out - they rust together sometimes

Remove the flap and hinges from the bootlid.
Remove the number plate from the flap and hold the number plate centrally in the recess. Mark the number plate holes onto your bootlid with a texta. drill these holes with a drill that is slightly smaller than the screws you intend on using. Using rubber washers between the plate and bootlid to eliminate rattle, screw the plate on.
Next you need to drill the bootlid to fit the light. i believe the rubber gasket from behind the light can be used as a template (can anyone confirm this???) . You'll need to drill the 2 bolt holes (and maybe the wire hole??? has the number plate covered the original wire hole???)
The remaining holes from the flap hinges need to be covered to stop water getting into your boot.
p.s. if the sharp ends of the screws are exposed, push a bit of small diameter hose over em, or you could even bolt the number plate on.....
i'm sure someone else can add to my comments, so dont do it just yet....
