Those are already in the alternate section with this note
“There are at least 2 different versions of instructions for this set. The differences
for the second version are indicated in this inventory in the Alternate Items
section with Match ID 99.
Quick overview of redesign: In the base of each of the eight corner spires a
white inverted double 4 x 4 slope is replaced by the new variant with holes.
A white 2 x 4 plate is then added inside each slope piece to cover the holes.”