Hello and welcome to Tom's Hardware Forums.
If you Google for your laptop's make and model followed by "service manual" you will find links to sites where you can download or just read the manual. That will point to the way of finding the wireless chip and it may be as simple as opening a hatch on the base of the laptop and seeing the chip beneath that hatch. If that doesn't help, please start a new thread of your own because this old one is closing.