Learned something new today

I’ve never seen or heard of a rear speaker option for early Barracudas. Installing carpet in my 65 today I found this on the passenger side. Im totally averse to cutting speaker holes in my doors or trunk divider, but this gives me ideas. Anyone have a photo of the correct speaker grille?A346EC05-30CA-4E19-85FB-F786D005B5F5.jpeg49A6E74E-82AE-443A-8E58-4780C04CD602.jpeg