May want to ask treeroot where he got his, nice oval square link style. It is best on all 4 wheel. but when going up, on front, when goin down on rear. Reasons are you want to chains to do the best for you, so going up you are pulling through stuff and most of the weight is over the pulling axle. When going down, if on front, rear end likes to come around so chains go on rear. Short stuff not a big matter, but long down hills with ice, it is best to have the chains on the rear.
Antother method I have seen reccommened is oposite corners of the truck, one front, one rear. I guess the thought is one will bite to not allow the swaping of either end. And that way if no lockers a wheel will find some traction and pull you forward. Good for a experiment if want to try that method. good luck robbie