I just discovered there are wiring harness adapters as I used one on my car to install a new cd player recently. I found this one on the internet not sure if it is the same car you have.
then you can buy a harness adapter from this adapter to the make of cd player like as an example Kenwood Cd player adapter.
A car auto store may know about these wiring harness adapters the advantage of using them is it makes it easy to install the cd player and if you ever decide to change the cd player in the future you can buy the adapter suited to the future player and plug it into the malibu car wiring adapter as the car adapter converts the factory wiring into a universal wiring standard.
make sure the radio and cd player works and the climate control work properly before completely re assembling the dash board .
I forgot the aerial cable plug !
I used Aeropro brand of wiring harness for my car that I got from
Car Accessory store in my country . I had to cut one wire and connect it to Pontrol to get my power aerial to work correctly. Which the store salesman helped me work out which wire controlled the cars power aerial