Did my rear ambient light conversion yesterday,dead straight forward. And quite pleased with the results
Heres what i basically did.
1.remove light unit
2.find centre point of light housing,mark with pencil.then mark out position to drill holes-i went for 40 mm between centres of leds.
3. Drill 2 x 5 mm holes and deburr
4.fit leds and glue in place.
5.once glue had dried.soldered the connections
6. Re fit light unit.
7. Sit back and admire youre handy work!!!
I had a look at the guide that was posted further up this thread.
Will get some pics up soon!