How to use smart card slot with Dell Latitude E6420?

Dell OEM Latitude 7480 7490 Smart Card Reader Slot Cage and Circuit Board

So I'm shopping around and I land at a HP laptop An HP Elitebook 1040 G3 The seller on ebay doesn't even mention anything about the SC slot So I

dell latitude 3480 m2 slot Align and place the smart-card reader on its slot on the palm-rest assembly Replace the two screws that adheres the smart-card reader to the

dell sc slot Shop for Media Card Reader Dell Touch-Screen Laptops at Best Buy Find low everyday prices and buy online for delivery or in-store