either. placing them in the upright position gives them instant saleability, placing them sideways gives you a better colony in a shorter time but lots of amature hobbyists (people who buy the most frags) dont recognize that and wont buy sideways frags.
just think, how does mother nature frag. you can bet dollars to dougnuts that she doesnt put them upright. no she lays them flat and lets them grow. they are designed by nature to grow fastest sidways after trauma for survival of the colony.