Hi odell, welcome to iFixit Answers.
The airport extreme wireless card will not work in your iBook G3 clamshell. You need to buy the first generation Apple wireless card. The airport extreme wireless card will only work in iBooks G4/PowerBooks G4 and G4 towers so return the card for a refund or maybe your seller has the first generation card if so ask for a swap..
Here's the card you need:
http://aftertheMac.com/wireless/airport_card.jpg
Here's probably the card you received:
http://orangeyemen.com/shop/images/orangeimages/AirPort%20Extreme%20Card.jpg