We scoop out the last* of the exciting** bits: an LED indicator cable, and this weird interconnect board!

* Technically we still have the trackpad, keyboard, and DC-in port.

** Author's discretion

Living on the interconnect board and managing the keyboard, keyboard backlight, front LEDs, and dual mics:

SMSC (Microchip) ECE1117 multi-function BC-Link/SMBus companion device