Put the feed tube onto the bigger tube on the carb, and block off the narrower tube. I usually pinch it off and sweat solder it closed to seal it. You could also put on a short piece of tubing and plug it.

If you got the needles out of whack now, just set them at 1-1/4 to 1-1/2 turns out and start from there.

Here's a picture of how mine is set up.

Jim