The magnetic stripe reader (MSR) is located in a slot on the right-hand side of the terminal. When a payment card is swiped, the MSR reads the information encoded on the card's black magnetic stripe.
To correctly swipe a card on the MSR:
1. Ensure that when you swipe, the card's magnetic stripe is down and facing towards the terminal. (Cards can be swiped from the back of the terminal towards the front or from the front of the terminal towards the back.)