MAX7219 and LED matrix

The wiring is very basic, and what you have should work fine, you just need to pass your 3 pins to the LedControl constructors. I did wire it as in Arduino Playground - MAX72XXHardware but without the 10uF capacitor, and 18k for the ISET resistor. I've got din, clock, and load going to 12, 11, and 10 on my arduino, and the LED pins based on my matrix which I worked out by testing.

The main thing you'll need is the instructions for the library which are here: Arduino Playground - LedControl and it includes a test sketch to make sure everything is working.