Need help with HW-30

[Malcolm Leonard]

Just found at a yard sale and have a couple questions.First,is anybody able to send me  a schematic?(Snail mail preferred...but *some* e-mail attachments do work out fine;I guess it depends on the sender's particular scanner setup.)

And,this one has two empty holes in the front panel just above the name "The Twoer".What is supposed to go in those holes?Also,on the rear panel of the case,on the left side,and closer to the top than to the bottom,there are three more holes laid out in a triangular pattern.Is something missing from those holes,also?
Thanks!
Malcolm Leonard

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