Emacs Keybindings for early LISP keyboards and iMac BT?

Does anyone know the physical to functional keybindings for early LISP
Machine keyboards, Symbols, Knight, Space Cadet etc featured here:

http://xahlee.info/kbd/lisp_keyboards.html

I did an analysis against the Space Cadet against my iMac Bluetooth
keyboard.  Here are some rough samples because physical mapping is not 1-1:

iMac.                          Symbolics Space Cadet
Command Left/Right  Space or no key
Option Left.                Control
Control Left.               Control
Fn Left                       Meta
Option Right.                Control
Left Arrow Right.         Control
Up/Down Arrow           Right Meta
Caps Lock                     Alt Mode or Rub Out (Delete under char?)
Tab                                Network or Tab

I'm suspicious that the Space Cadet ALT MODE which is close to the iMac TAB
may be the original mapping to Meta functionality because it corresponds
easily to the pinky figure.

Also, does anyone have a good keymap for using Emacs with LISP using Mac
OSX and iMac's BT keyboard.

Appreciate anyone's guidance on this.

Thanks!

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