I was able to "wake up" those hotkeys on the left side of the PC-issue Kinesis Freestyle 2 keyboard using the "Keyboard Shortcuts" feature on the Mac:

1. Open System Settings > Keyboard.
2. Select the Keyboard Shortcuts button to open a new dialog box.
3. Select the App Shortcuts link to open a new dialog box.
4. Add a new shortcut by selecting the "+" button.
5. Select an application from the Application dropdown menu, or leave it at the default value "All Applications."
6. Type the name of the command in the Menu title field. Examples include Delete, Copy, Paste, Undo. Note: you'll want to input multiple examples of the Undo command, as some applications will have separate commands for Undo Paste, Undo Cut, Undo Delete, etc. I had no problems mapping multiple versions of the Undo command to the same hotkey, and using the hotkey in Chrome.
7. Select the Keyboard shortcut field.
8. Press the hotkey that you want to map to the command.
9. The field will show the key combination that the hotkey returns.
10. Select the Done button.