Here are some more detailed pics of how the adjustable "choke cables" are installed for the air dam vents and the adjustable WAI.
First, here is the HVAC vent in the top center of the dash which I removed in order to drill holes thru the cowl into the engine compartment to route the cables
I had to use some long reach drill bits to drill the holes because of the slope of the windshield. First I drilled a 1/4" pilot hole and then a 1" diameter hole with a step bit. I got all of these items at Lowes.
There are 3 metal bulkheads that need to be drilled through to get from the interior of the car to the engine compartment. The first 2 I drilled from inside the car and the last one was drilled from the engine compartment toward the interior. The cables are the 3 thick black ones coming straight out of the grommetted holes. The other wires are from the gauges to the sensors and power requirements.