Thanks ladies! :) I appreciate your feedback! I will definately go down to the fire dept today and get this figured out.
I think you are referring to the LATCH system. Your car should have hooks between the base of the seat and the back of the seat...where the seat belt buckle comes out...somewhere in that area....If it does NOT, then you need to install the base with the cars seatbelt. Like tiredbuthappy said, the one you are referring to is a tether not the latch system. Not all vehicles are equipped with LATCH. Just remember if you use the seatbelt and it is the one with the shoulder strap you have to use the locking clip that comes with the carseat. If you use just a lap belt you do not. Again, like tiredbuthappy said, you can call fire and police departments and ask for a certified carseat installer. This would be your best bet in order to ensure your carseat is installed properly. Once installed your carseat should not move freely more than one inch in any direction.
definitely have the police or fire department show you the first time. We cannot give you safe advice, especially since all cars are different. Another option is to read your car's manual. It should tell you where the latch system is, if there is one.
by the way, the one you are referring to (the one by the trunk) is a tether for a front facing carseat.