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Most schematics asside from some 1920s ones have absolutely no correspondence between position of part on the page and mechanical location of part on the chassis.... honestly if you understand circuit theory it is best that the schematic not include mechanical layout to make the power and signal flow easier to read and follow.
The best thing to do is to if you are having trouble matching things on the schematic to the chassis is label each part with the letter-number designator on the schematic (some 20s schematics may need you to add your own designators). Some parts are easy to identify, and if you trace unknown parts to known then look at everything hooked to the known on the schematic you can trace it out.
TV collectors like me have to do this activity accurately on 20-40 tube TV sets regularly.
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