[morzh]

The missing two is the one right above the bottom wirewound next to the transformer (right to the backelite next to the transformer) and the one right above the two missing electrolytic caps.

BTW, you are missing the wirewound heat shield, and it is needed. (see my photo)


What I would do:

Identify from the chassis layout in the documents the identifiers of the missing two backelites.
Then simply find what they were wired to in the sch and trace the wires. This is the best I can suggest.
BTW, I see big tubular cap under the heatshield is also missing.

   



PS. The three dark-chocolate caps at the right upper corner and one in the left upper corner just could be some of the backelite sub parts.