ok, so i strongly suggest some edits.
First step 5 through 8 don’t need to be done. Step 4 should include removing the 5th screw in the main circuit board, and then on to step 9. Step 9 should also describe the black release lever to unlock the ribbon cable. then the whole front assembly with the lens will come out.
as for the three ribbon cables attached to the back case (for power and the buttons) if they do come out, while the black panel is detached, you need to pull the tape off, lift the three locking levers and very carefully reseat the ribbon cables, reapply the tape and continue with the reassembly