No anchor(s) will work without access to the other side or by filling and reinforcing some of the hollow cells.
You have several issues: 1) The force on the top anchors are in withdrawal, 2) The unreinforced cells are not suitable for expansion anchors, 3) The unreinforced masonry could fail
1) The metal brace you are trying to attach “stands out” from the wall 24” or so. When loaded with your weight, this puts a rotation on the metal brace that creates a withdrawal on the top anchors. ( I’m not worried about the bottom anchors, because a piece of wood could be installed to help distribute the load along the wall.)
The top anchor (and the middle anchors) will require a significant amount of holding power, (measured in foot-pounds). No company will provide stress values for such rotation, including Simpson: see attached:
2) The walls of unreinforced masonry are called “shells”. All masonry anchor manufacturer’s , including Topcon, Simpson, provide stress values for solid reinforced masonry or concrete ONLY. The reason is because as you tighten the expansion anchor, it will crush the masonry material around it.
3) Even if you could get the expansion anchor to hold in the face shell, the entire masonry unit could crack and fail as soon as a load is applied.
However, if you are able to get to the other side of the wall, you could place a large flat steel plate on the wall to distribute the load.
Or, if you could remove a face shell, you could install rebar in the cell, fill the cells with grout, and install an expansion anchor to the cell.
Note: If you look closely at the attached site, you’ll notice Simpson shows an anchor installed EXACTLY between the two hollow cells in a masonry unit. However, there’s no allowable stress for such an installation AND your illustration shows two anchors side-by-side so they both could not fit in such an application anyway.