The White Hand, Overview, Sites wrote:There are four Fallen-wizard site cards: Isengard, The White Towers, Rhosgobel, and
Deep Mines. These site cards have a light gray background.
Unless stated otherwise on a card, a Fallen-wizard player may use these sites instead
of the hero/minion versions.
Most Fallen-wizard companies use hero site cards when moving to non-Fallenwizard
sites (see the Movement section for exceptions).
Underlines mine.
"abc company use xyz site" is compact form of "player use xyz site for abc company".
Like "Two attacks, all against the same character" is compact form of "Two attacks, all strikes must be assigned to the same character".
Technically an attacks are against company, not against particular character, a company does not use a site, site is used to represent company's location/movement (not moving company must be located somewhere, even if it cannot take any activity).
Treat above as an attempt of reconstruction the sense from ambiguous records.