This is what I found about the placement of the pixiu.
"The placement of the PI Xiu is simple.
The reference point is their position of their leg. U would be noticing their front limbs one in and one out.
Both Pixiu one is their rright leg pointed out, and the other one is left leg pointed out. Take notice. This is the pair.
So if you are holding them facing out. On your left hand pi xiu should have ItS left leg step out first, while the Right hand hold the one is right leg out."
the one with the Left leg extended should be on the left side & the other on the right as they look out of your home. As these are jade, I would place them off the floor where they can watch the entry to your home.
Mentor777, JackieLee, & Rapinau may have more information about these guardians.
lady moon