No more pics, but there's not much more to show.
When I pulled the shifter off the car, I saw that the lower part had a good sized gap between the cover and the actual shifter rod. I drilled a hole well oversized for the button, and then took a Dremel and shaved a groove to help hold the base of the button (the sidewall was a little too thick for the button to reach through).
To make the button, I got some perforated board at Radio Shack - it's got a regular grid of holes and copper rings around each hole. I soldered the 4 corners of the button to a 1/2" x 3/4" scrap, and then pushed the wires through the backside of the right two holes and soldered them to the contacts. I put the button in place, mixed up a little epoxy, and glued it down. Afterwords, I also stuck a little electrical tape to prevent any shorts from the rod, since shorting to ground would kill my engine.
The way the shifter is mounted goes like this: there is the rod, and a plastic clip set in a groove on the rod. The shift boot has a ring that sits on top of that clip, and the shifter top screws down until it's clamping the boot against the clip. What I did was pull the boot away from the center console, broke a little bit off the clip, and put a hole in the boot so that as I spun the shifter cover on, all three pieces could spin around with the wire. Then once the shifter was where I wanted it, I attached the wire to my lead coming from the relay, and put a screw into the floor for the other side of the switch. Then clip the boot back onto the console, and you're done.
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