As an FYI for anyone looking for the answer on this - Yes, it appears that if your 8920B comes with the option that works with an 83206A (or I would assume any of the other test sets), then W13 will actually be taken to the back of the unit.
I used one of the cables that connected those ports to the 83206A to connect the appropriate ports and my unit passed the RFDIAGS2 tests.
TonyG
