We can write them applied at and expressed in body frame, B, assuming the center of mass in the center of the brick and the brick has length l and height h:
I think there's a typo in the friction cone constraint for location one. It says
$$|f_{1,B_z}^B| \leq \mu f_{1,B_z}^B$$
but should it be the following? (replace z with x on the left side of the inequality)
$$|f_{1,B_x}^B| \leq \mu f_{1,B_z}^B$$