What kind of water? What kind of dock? Here we have to deal with tides, so unless it's a floating dock you're bound to bounce now and then. I agree with Doug's question, I don't know what you mean by "2 hole".
If the water isn't too active, just crossing the lines in conventional fashion should do the trick, meaning the lines tied to the dock to the starboard side go to your port side cleats and vice versa. The rubber snubbers you get from the marine store help by working as shock absorbers on the lines. The only solid insurance is to add spring lines...
JIM
Alexandria, VA
1989 32' Sedan
'Gammelby'
Friendship, MD