Wiring Proxima
See the wiring diagrams in the sub folders for each type of throttle valve. There may also be custom firmware for different models like the Citroen TxW. Make sure to connect the free wheel diodes correctly and let the Proxima power its own relay as per drawing. After the unit is tuned you may load the lock file which means the firmware does not have the ability to write to memory during interference spikes on the micro. If you need to make adjustment reload the normal firmware. You will need a Firmware Programmer for this option.
Basic universal drawing
X03 Reference Wiring Diagram.pdf
X04 Reference Wiring Diagram.pdf
Specific models drawings
Harness design drawings