window regulator button illumination - Toyota Celica, 1.8L, 2000

I made the backlight of the window regulator buttons, burned through the channels for the wiring under the buttons and under the buttons, the planar diodes were sealed, even my fingers did not feel anything. on the third photo, one groove is only highlighted, then at work I made a second.

litter for quality, photos from iPhone, no fotik)