Christopher Phin on the design of the Power Mac G5:
And when you wanted to fit Wi-Fi—2003 was well before it was standard in a new computer—you could just slide the AirPort card in through this retaining bracket, slot it into the connection on the motherboard, and then attach the antenna which was helpfully held in the right position for you with a small clip.
I remember this was my favorite Mac to install RAM and/or an AirPort card. One, because we sold so few of them relative to PowerBooks and iBooks. And two, experiencing the thoughtfulness of the AirPort card's antenna connector delighted me every time.