I was laying cables for parking sensors to be used with the Rover 75 ride I got free of charge from my father. Running them from the holes in the bumper to the engine compartment was no big deal, but connecting the main unit under the bonnet to the display in the passenger compartment was a little harder, since I needed to find a way to run it through cleanly enough.
As improvisation goes (and as my father wanted to do himself) you would be tempted to use, somehow, the cable tubes that you see right in the middle of the rear wall of the engine compartment, but that’s gonna be a hard task. On the other side, if you don’t need to run really big cables, you can use a small hole which you can find on the right side (looking toward the engine, and on my car which has the steering wheel on the left of the cockpit) under a plastic grid you have to remove first.
You have to pull out a waterproof rubber neck that’s fitted around another rigid cable passing through there, to free up enough space to actually run your wires through.
Then you have to access to the cockpit side of the hole.
There is some unscrewing to do here
Once you remove the screws, you need to pull the panel out, and if you want a more comfortable working environment, also pull out with a discrete force the front panel where the lights switch is located to free up a larger area.
If you are in a well lit ambient, you should now be able to see the cable probe (or whatever that’s called in english) passing through the hole you just freed
Let the cable(s) pass on the side of the panel you prefer (door side in my case) and then screw the panel back in place, after reinserting the frontal panel under the steering wheel if you pulled it out.
