Service information is in Riders TV #8, the only Majestic in that manual.
The Volume control connections are low end to ground, wiper to .005 cap to grid of 6T8 triode, high end through a .047 to TV-phono switch.
The contrast control high end goes to pin 8 on the 12AU7 video amp and the wiper goes to ground through a 100 ohm resistor.
The Sams should be close enough in this area. They seldom goofed up that bad!
