This may have been done already, but I couldn't find any info. I wanted to put in a power antenna with manual operation being able to use the stock Z switch. I used a Harada MQ1 antenna and 2 SPDT relays. Here's the wiring diagram if anyone is interested. It uses all existing wires from the harness without needing to run any more wires to the back of the car. When you're looking at the plug that's inside the fender by the rear marker light, the bottom sideways connection is ground, the right is up and the left is down.