The model A1458 is a wifi-only iPad - it does not have a SIM slot since it does not have any cellular radio for connection to a cell service provider's network.
If you wanted a wifi/LTE iPad, you bought the wrong model. If you bought it from Apple directly, you can return it within 14 days of purchase for a full refund, and then buy the wifi/cellular model in stead (which will cost more).
P.S. a reference to iPad models - http://support.apple.com/kb/HT5452