E-Body Convertible rear speaker placement?

Question for convertible owners: where/how do we fit rear speakers in these cars? I had a 70 challenger hard top in the past, so dropping a couple 6x9's in the back package tray was a no-brainer. This is my first convertible and I want to fit it with a decent sound system, hoping for 4 speakers, with two of them in the back.

Any advice is appreciated, and pics would be awesome.
Author: TripleBlk70