I have an 2001 ss camaro and I woke up to a puddle of antifreeze under her. Reservoir is full. Hoping it a nothing major but where is the location to the freeze plug

To locate the freeze plugs, use a mechanics mirror and look.on both ends of the heads and both sides of the block. But something telks me it is not a freeze plug. Did the engine overheat before you left it? Was there any coolant on top of the engine? If so, look for a sensor on top. If you let the car sit overnight, without there being no more coolant loss than shown in the pic, it is more likely to be a pin-hole in the upper radiator hose. Also, locate and check the coolant-temperature sensor.

If you are sure that it is antifreeze and reservoir is full, start up your car and put it on car ramps or a rack and find the location of the leak. You can run the car until temp gauge registers mid-temp especially in cold weather. A fan blowing on the motor will help cool engine. Good luck finding the leak.