I am running on LPG. (i only start on petrol)
The black boxes are gas the injectors.
The LPG Fuel computer picks up the fuel injector signal and translate this to a Gas injector signal.
You can see the hoses cross each other because the person who has installed the LPG installation have made a mistake.

This summer i hope to correct this and cleanup everything
Yes i used a jump wire........ before i killed the second knocksensor.
After i killed the second knocksensor, i was planning to replace both knocksensors and delete the jump wire.
But have done other wise and save one knocksensor ....and have one in spare