Afaik, the stat is in the top rad hose, on 4x4, and goes top the rad top connector just under where the std i/cooler is, the bottom one runs from the rad to the angled pipe on the water pump pointing downwards.
The main difference is the 4wd stat has a little extra end bit which is another valve which blocks off another circuit, the 2wd stat is just a normal stat single type one.
tabetha