get an extension cord with ground prong and just google etc 111000 wiring guide. there will be some guides that eliminate the ground prong, ignore those. it's pretty straightforward. you just need a wire stripper and a screwdriver.
that's for the ranco anyway. the johnson controls version works just as well from what i have read. the important part is to tape the temperature probe directly to the glass of your fermentor and not let it dangle in the air.