How do I assemble the MAX7219 boards and how do I connect them?

1. Solder 7-segment displays (Attention with the right side!)

2. Solder Max7219 (The board has a white border where the MAX should sit! The bulge indicates how the MAX must be aligned)

3. Solder Resistance (The resistor has no polarity, so it does not matter how it is soldered around)

4. D and L are both data buses that you also connect to the respective network.

5. + 5V please connect to the 5 volt power source

6. Connect S or S1 to the Multiplexer Output pin or directly to the Arduino.