7407 is a wall of ashlar blocks cut irregularly and likely in secondary deposition to form a southeastern wall for room H-10. It seems to keep the line of an earlier ashlar wall beneath it. The construction of 7407 was likely connected to a renovation/reorganization of the space of room H-10, the trapezoidal structure, and the piazza.
View from west
View from north
View from east
Series of walls and features in central piazza
Sketch of Area H SU 7331, 7335, 7405, 7406, 7407, 7408, 7409, 7410, 7411, 7412