There are some diagrams out there, I just don't know the links to them. Techtonics also makes one, that plugs in to the throttle switches for actuation.

I have seen the switches and the brackets for the throttle switches fail, which kills your enrichment and endangers the engine. I finally ditched them before I went to IT Fest a few years ago and just used a dash mounted switch. I found that once up to speed I could just leave it on rich all the time. It does make it too rich at low rpm though, so some a throttle acutated switch that acts at 2/3 - 3/4 throttle is nice.