its side to avoid having it roll away.
place your spare tire on the hub. after the flat has been removed you can put the spare tire in place. to do this, line up the rim with the lug bolts. gently push the tire until the lug bolts are showing through the rim.
begin tightening the lug nuts. after the tire is placed you can begin to tighten them by hand. tighten them as far as you can get them manually.
begin to lower your vehicle and finish tightening the lug nuts. using your jack, lower your car down to where the spare rests on the ground without the weight of your car 