Remember that one link should have an adjustable lift rod. When backing up, get the
other lift arm postioned just right, then use the adjustment screw in the other one to get it in position. But, don't worry, this is one of those things that you just have to learn to do. I don't think anyone can adequately explain things in words. I've only been doing it two years and I've got it down pretty well, I rarely have to use the adjustable lift rod. But some days it is still like herding cats.
As for the answer to your question, I've got some 3x5 inch 'posts' that are about 4 feet long. I use them to pry implements into place and to wack the living daylights out of the lift arm to get it into place. So far the only damage has been done to me.

(Splinters, bruised hands). I'm sure it isn't good form or good advice to wack the lift arms onto the hitch pins....but sometimes its just the ticket.
For better and more practical advice, park your implements on a hard level surface (I have none) and even better, park them on a dolly that can be moved. Lacking those two luxurys, at least park the implement on some cribbing, pallets, etc. It keeps them out of the dirt and makes them easier to move and/or hook up.