What you need for the conversion so are …

1. Power window switch
2. Lötkölben with tin
3. 1x ultra-bright blue LED 3mm
4. two small screwdrivers
5. Needle-nose pliers

To have to open the switch to be gelösst the 2 hooks on each side of the housing
2 small screwdriver to make himself quite well in both places at the same time to pry

The orange LED in the center is not just soldered it was set by the board and soldered from the bottom
Makes it the best to represent the iron increased somewhat (possibly stand) to hold the board with one hand and with the other hand, the herrauszuziehen Led by a needle-nose pliers

At this point simply solder the blue 3mm LED, also by putting their feet down from the board and solder

Assemble everything in reverse order and it should end up looking so