Connect wires with Arduino
How it's done
Connect wires from relay module to Arduino pins.
Gnd - yellow - Gnd; In1 - orange - pin 13; In2 - red - pin 12; In3 - brown - pin 11; In4 - black - pin 10; Vcc - white - 5V
For In1 to In4 you can use any pins (2 to 13 or A0 to A5) on Arduino board, but you have to remember which pin control each relay line to setup code properly.