Dan you can collapse a square by pulling any line. That said best plan if it is windy is to pull on one brake toggle, might have to windup some line. If you are going to collapse a square by pulling a suspension line, ones in the rear corners will work faster and easier than middle/front. Brakes will already be in your hand so it's going to be the best bet. Side note collapsing any parachute by pulling on a line in windy conditions without gloves on is going to leave a mark.