Identify which crib model you have by checking the assembly manual. Make sure the version of the crib you have is not a recalled model. Check the Consumer Product Safety Commission's website to look for recalls. If the model of your crib is one of the recalled models, you will have to order additional attachments to make the crib usable for your child.
Call or visit the store you ordered the crib from and tell them your model number along with what attachments you would like them to order for you.
Install the attachment by following the manual's instructions. If you have any questions regarding installation, contact your retailer for further instructions. Proper installation will ensure your baby's safety while using the crib.