Nice write-up.
Attached is a PDF version I made (using the
PrimoPDF print-to-PDF converter).
See my
SVX Audio Installation Guide for detailed instructions on removing the radio as well as running wires under the carpet next to the transmission hump.
The "power antenna" lead is usually not a good choice to use as a remote-on for an amplifier, since most radios only activate this lead when you listen to AM or FM (and turn it off when you switch to CD, tape, satellite, etc.). If your radio doesn't have an amplifier turn-on lead, you should use the +12V Accessory (key-switched) wire.