Dakota Digital BIM-RGB Manual page 8

Connections for Custom Switch Option
Wire the number of switches you would like to use to the appropriate wire color and the other end of the switch to ground.
You could wire up the On/Off switch and the Music Mode switch only, or all four switches. That is your choice.
Figure 3 shows the pin connections.
Figure 4 shows how to make connections from the harness to the switches.
Figure 3 Switch Input Connector
Figure 4 Switch Wiring
8 MAN # 650810