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Lots of wiring questions (Homelink and the purple plug cable)

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Got a new project fixing some stuff on a second Roadster with lots of cable issues in the dash area:

0. If anyone has a wiring diagram, I would love that. The service manual seems to assume that wires require no servicing. (Ha!)

1. Homelink cable: Does anyone know where the homelink cable goes or is there a general wiring diagram? Is there also a part number for this cable or ideally some other (non-Tesla) OEM cable that fits? I know the homelink module is an Audio/VW 8K0 907 410A H04. But where does the cable go on the other side (beneath the dash)? What plug is on that side? Any ideas as to plug name/number?

2. What is this? Another broken cable (on the far right - next to the passenger airbag (behind/underneath the right vent duct) ...
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3. Does anyone know where the radio cable goes? seems to be broken as well ...

4. Replace an atrocious and non-working Blaupunkt radio. Turns out the cable was gone/broken. Ordered a Metra 71-8901 reverse harness and generic ISO harness to fix. Let's hope that is it for that one.
 
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The original antenna was just a wire that was tucked around the inside edge of the windshield, so it needed a booster. I never had any luck with that setup. I tried a flat style under the hood, but It always had interference when the car was on. There is no simple place to mount an external one, so I make do without broadcast radio.
 
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