In the engine compartment is a carbon canister to help contain fumes. A steel ring clamp, maybe 4 inches in diameter, holds the canister in place, attached to the driver’s side of the engine compartment, fairly low down, slightly below and to the rear of the power steering fluid bottle.
To loosen the clamp, undo the 10 mm bolt.
To remove the clamp from the car, undo two 10 mm nuts.
I sell used clamps for $5 each.