Check out this link: http://www.speedprint.com/deves50/doc/bwwiring.pdf
This guy seems to have it set up pretty well. The unit works like it's supposed to, but he has the option to make the OD shift up and down whenever he wants it to. I was thinking of doing the same thing. The way he has it set up is that he needs 3 switches in order to control it and he has them mounted in a box on the floor shifter. That's going to be a bit challenging to mount on/near the column shift. I know it seems a bit needlessly complicated to do, but it seems cool. I don't know...what do you all think?

49 Chevy 3600
65 Chevy K10
48 International KB-1 Service Truck
55 Willys CJ5 - Chevy 331 powered
26 Model T Roadster Rat Rod
70 Tucker Sno-Cat 442-A
96 Dodge 3500 Cummins dually flatbed x-cab 4x4
06 Jeep Wrangler LJ rock crawler
If you can't fix it with a hammer, it's an electrical problem