if you can post a pic of what you want to do, i can help you.
a pic of the open stat with the terminals showing...
i don't have any more johnsons and no other manuals.
this may help, on your cord you should have black, white and green wires. the black is the "hot" the white is the common/neutral, the green is the ground.
the cord end with the male terminals that go in the wall is your "line" side. the end with the female end or that plugs into your heat source is the "load" side.
vaughn