I have a 2003 Ford Windstar SEL and I can't locate the radiator cap when changing my antifreeze is the reservoir cap on this 2003 the same as the radiator cap

What is your question?

On my 2003 Ford Windstar is the reservoir cap the same as the radiator cap I'm changing my antifreeze over and drain in it out and want to refill my radio what new antifreeze, my question is is the radiator cap the reservoir cap as well