FYI. In ASL only 1 unit cowers and you use Random Slection to determine which one. So it depends on which unit cowers. Or more than 1 depending I the RS Rolls.
This is important if this happens a First Fire because only that unit is marked with Final Fire.
Should you determine which one in SK?
Jeff. I think in ASL the entire FG cowers two columns, but RS determines which unit is marked Final Fire (or Prep Fire if ROF involved).
Regardless, in SK, I think the entire FG is marked.