If you have just one car seat (NOT booster seat) I would put it in the center and attach it with the lap belt. That belt works better with car seats and your kid will be also be well-protected from side impact intrusions.
I have the center console with the beautiful wood compartment. I am out of luck there
"DON'T USE THE HEADREST!
For $40 or so, your local dealer will install the proper child seat tether anchor. Required by ALL makes and models from 1988 on. There are special mounting spots in the parcel shelf of your car."
blackmercedes, that is what I am going to do. Thanks again everybody.