The braces are fixed to the outer ends of the yards, and are led to the deck as far aft as possible, to allow the crew to haul on them.
The lower yards' braces can usually run directly to the deck, but to do so with those higher up would mean that most of the force was pulling downwards rather than backwards.
Braces from the aftermost mast that run to the very stern of the ship often pass through blocks attached to short outriggers projecting from the side of the ship in order to improve their lead.
The sails on a tall ship's mast must all be turned together, because of all the gear that runs between them.
The rate of turn is set by the course, the heaviest yard and hence the most difficult to move.