How to solve the Resident Evil 4 Remake sword puzzle

The Resident Evil 4 Remake sword puzzle can be found in the castle's treasury once you've paired up with Ashley and have fought off the Garrador in the dungeon. Once inside, you'll see four metal engravings of knights with swords and a locked gate with three symbols on it to your left.

To solve the sword puzzle, you need to open this gate through a combination of pulling cords and shooting symbols, before retrieving the bloodied sword inside to arrange in the mural of metal knights. So,...