The display shows a nice glow-lamp orange color when forced on using the crocodile clamp contact
The zip archive below contains the schematic as .png (pixel graphics) and .wmf (scalable vector graphics). But best is opening the schematic source file with Eagle layout editor so you are able to highlight particular nets and wires.
The M-0066-1 seems to expect a nearly-CRT signaling with serial pixel data and horizontal and vertical blanking gaps, serialized in columns, then in rows. (Think the display rotated by 90 degrees clockwise, and then think you have a standard cathode ray tube with beam deflected from left to right, then downwards.)
And the M-0067-3 is the accompanying „graphics card“ with 256 byte memory for the 32×8 plain (7-bit) ASCII characters (from a character generator ROM) plus 1 bit underline attribute.
The detected schematic for the picture generator (1977 × 1563 pixels).