1966 Barracuda Restoration Project

Well I think it's time I revive this thread! I've been slowly working on the car over the past year and a half. Since then I've replaced both lower quarters, finished the cowl including painting the inside of the cowl body color and cleaned up some minor bodywork issues. I've purchased an 8 3/4 rear with a 489 case posi and LBP axles, bought the rear disc conversion for the rear and had the housing and K-Member powder coated. Anyway, I've got a question for all you experienced Mopar enthusiasts, attached are pictures of my trunk pan. Can anyone tell me what went in the rectangular holes? My alzhiemers must be acting up because I can't remember for the life of me what I took out. Thanks, and I look forward to updating this more frequently and encourage any feedback and suggestions you all may have.
Jim