1) is this the upper RFI shield?..
1) The upper RFI shield is not needed. It actually blocks air flow which shortens the life of the analog board due to increased heat. Apple included it on the original Mac 128k analog board, but in later revisions it was no longer included. Hence, if you see this long aluminum part soldered into the upper part of your analog board (sitting right near the top of the Mac itself), then desolder and remove it.
2) The lower RFI shield is needed. And, only if required, it should be further insulated to prevent electrical shorts.
3) This harness originally came in a thin 22AWG wire version. It would be better to use the thicker 18AWG version, although unless you make one yourself (not likely) an existing 18AWG harness alone will be impossible to find, even on EBAY. But don't fret, the 22AWG version works fine. It's just that the 18AWG version would be "better in theory."
I hope this helps. And thank you for helping me improve the spreadsheet!
2) Which one is the lower RFI shield?
3) is this the 22AWG wires?
