I have 2 Arduino boards to fit in my car:

- one is driving the CANbus display => it will be fitted in the glove box for ease of debugging

- the second one is the bluetooth remote control for the smartphone => it will be fitted near the stearing wheel (where the remote control buttons are attached)

The easiest is the remote control: a ribbon cable is running between the remote control attached to the steering and a compartment near the fuse box:

The arduino board will sit here waiting for a firmware update.

For the display, it is trickier as I have to remove the dashboard bezel. I runned a 4-wire cable (+12V acc, GND, CANH, CANl) between the display and the glove box:

The arduino board with the canbus interface and the bluetooth spp module will be in a case in the glove box.

It's time to find some box for my boards...