STEP 1: Let's start from the electronics. All passive components, first,
starting from the lowest till the tallest. Take the four resistors, bend
the terminals 90 degrees and add them to the Main PCB as shown in the
pictures below.
Also add the LEDs, pay attention to the polarity and the posisions. The
shorter lead towards the edge of the board, yellow on the right, red on
the left.
Proceed with the soldering of these first components and cut the exceeding
leads.
