I dunno about direction, it should pull the air through the radiator from front to back
BTW, NAPA part number FS130 is the switch you need. And they are a bit proud of it, somewhere north of $20, still about half of Ma Kaw's price. As a bonus, you will find that this switch will engage at a slightly lower point than stock, and run until a lower point. It works fine with the 195* thermostat that I use, and should work very well with the stock 180* 'stat.
BTW, if you are quick, no need to drain the coolant to instal the new switch. Just do it on a cold engine and do not loosen the radiator cap. You should lose almost no coolant.