These blocks appear to rest in a cut of block 5492, perhaps indicating placement after the original contruction of the walls of room 6 (5373, 5308, 5492). The threshold leads up into area south of ashlar wall 5006, in western side of sector. This marked the transition between room 6 and the back part of the middle terrace; its alignment on the same line as the staircase seems significant.
Pavement in northwest of area F south, south of 5006