I know it's been over a month. I've been hesitant to reply to this as I could not find any pictures that I would consider a good and accurate representation. My cars have all been in storage now since Sept and they're not easy to get to if I wanted to take some pics but the attached pic will likely help. Since there really aren't a lot of wires/cables coming through, this pic and some explanation should be useful. I believe your car is a '51 and this pic is a '53 but it should not matter much. As far as wires go, there's really only one factory opening and that's for the main harness which is in about the 1 - 2 o'clock position on the driver side vent damper opening (as you're looking at it from the front). It's hard to see that in the picture. The speedometer cable comes through the opening in the 11 o'clock position of the driver side air vent damper. In the picture it appears as a large, thick black cable because at the time I had one of the generic speedo cables from NAPA in the car. The choke cable and passenger side vent control cable (if so equipped) come through the grommet with the metal pieces around it. Other than those, I don't think there's any that are standard. The parking brake should be obvious and signal lights were optional so it's hard to say where those would go through. In the picture you can see a black cable coming through above the drip line on the passenger side. That's the antenna cable and I can't say that it's how it was done at the factory or dealer as I know we added the radio in the '70s and likely just drilled where we felt like. The silver clips on the drip line hold the wire for the passenger side horn. The ones on this car were not painted so I painted them silver. I've seen on the earlier cars that they are painted the color of the car so there must be a cross-over point where some cars where painted after they were installed.