I'm using three of the 4 zone outputs. Zone 1 for the front, zone2 for the rear speakers I have, and the sub pre outs from zone1 . I have zone 3 feeding a jack up in my left fairing pocket to feed a Sens Bluetooth transmitter if I just want to hear music in my helmet. I am not using zone 4 or the two auxilary inputs. or the white USB charging jack
I have the Sirius XM plugged up to my SiriusXM tuner.
I have the PAC unit plugged into the Steering WHeel input jack
I have my powered antenna plugged into the antenna.
I have the cable that connects to a USB jack in my left fairing pocket plugged up to the USB input.
The PAC unit, Zone 4 pre out, the white USB charging jack and the two aux inputs are in the box and I have the cover back on the box. There really is plenty of room.