The far right screw hole on the speaker has a contact bracket wrapped around it. This small part may fall off unexpectedly, so it's best to remove it and note the orientation for reassembly.
The flat portion of the contact clip should rest against the speaker, as shown.
The alignment bracket on the far end of the speaker assembly is adhered, but may fall off if handled aggressively.
The angled end should face up and line up with the outside edge of the speaker.