Andrew-rodeo replied:

Hi mate! You just use the switched wire on the back of the brake light switch. Nothing special to worry about.

Garthski replied:

Try this link all the info is there,

www.tekonsha.com/product1.html

been looking at it myself

cheers
Garth

Gronk replied:

Yep, easy as. I picked up the switched wire at the fuse box beside the drivers foot because it was easier to get to( forget what colour wire it was )
Mine is a Prodigy also, just make sure you use some good size wire ( 8mm or bigger ) to the rear plug so you get a decent 12v at the brakes.