Steering Wheel Control Board for 350Z Pre-facelift

Here is a modified steering wheel control board designed to work with the CarPlay/Android Auto system, as demonstrated in the YouTube tutorial below.
This board routes the Volume UP/DOWN commands to the head unit, while the other commands are redirected to the CarPlay/Android Auto interface module (these commands will no longer be sent to the head unit after the board is installed).
Installation and pairing instructions are available in the tutorial.