I found the pin layout, thanks! I had already found the center hole (very conveniently, the oem radio's rubber thingie fit right in there).

I now also have found a bolt that fits the thread for the connector, but the notches in the connector don't exactly line up with the sled's connector shape. I don't think it's critical, but has anybody else had the same problem?
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32MB, serial: 10101626