Contains the 15 A fuse for the LED outputs.

Not used.

Connects the device to the auxiliary in and line/subwoofer out wiring harness.

Connects the device to the ground terminal wire (GND).

Connects the device to the +12V terminal wire.

Connects the device to the AM/FM antenna.

Connects the device to the speaker wiring harness.

Connects the device to the LED wiring harness.

Connects the device to an optional USB accessory.