Cyl #1, Cyl #2
Easiest way to know FOR ABSOLUTE SURE is to look at your coil pack. It has numbers on it for each cylinder. Find number 1 and track it to the number one cylinder (you could also track 3 and 5 to find out which side they are on, or track 2, 4, or 6 to see which side they are on - whichever is easier). 1, 3, and 5 are on the same side, 2, 4, 6 are on the other side. I'm not 100% sure about a 3.3 (it's probably the same - all mine are 3.5's), but on the 3.5's, cylinder 1 is on the left, cylinder 2 is on the right (if you stand at the nose of your car looking at the engine).
Hope that helps.