Yeah, I don't think it would make much difference to hook up the gas to the liquid fitting. I set my regulator at 20 - 25 psi, get the beer to temperatures in the 50's, pick the keg up by the top and bottom ends and sway it back and forth until I can't hear the gas bubbling in, about 80 shakes. Let it rest in the fridge for a day, vent off the excess pressure and serve. Sometimes it's a little overcarbonated, but after a few draughts it seems to be just about right. Even better to use the chart that was linked above to get more accurate carb levels.